Azed 2488 - Stuck In Se Corner

[JJ109]

There are special instructions:
From the answer to each clue the solver must omit one letter wherever it occurs (often more than once) before entry in the diagram. Definitions in the clues refer to the full unmutilated answers; subsidiary indications, such as anagrams etc, refer to mutilated forms entered in the
diagram. Numbers in brackets show the lengths of full unmutilated answers. The letters omitted, read in clue order, form an appropriate quotation (in The Oxford Dictionary of Quotations).

27a Sturgeon’s summary, in open view,lacking breadth, backing EU (8) _ UL _ _ U _
The letter omitted is an R
25d Mediterranean island moving third to first position in dance (6) E _ _ _ E
The letter omitted is an A

19d Critically correct dagger, head dropping somewhat (7)RE _ ESE
The letter omitted is an N, therefore I assume this is "Retense" (critically correct), but I can't parse the "retese"

Many thanks

[Spoffy]

27a Take the B (breadth) out of a six letter word for 'in open view', and follow if with the letters EU reversed('backing EU'). The omitted letter slots into position 3.

25d Take the name of a Mediterranean island and move the third letter to the top. The omitted letter goes into position 3 to produce the defined word.

19d No, the six letter word for the dagger begins with a C.

[ProfessorMaisie]

27 PU(r)LICUE 25 EC(a)RTE 19 RECE(n)SE

[ProfessorMaisie]

...sorry, if you just wanted hints JJ.

[JJ109]

No problem, thanks Prof. It is now finished! I enjoyed this one, being a bit different.

[ProfessorMaisie]

yes, it made a nice change, JJ.

[JF85]

Finally finished this at about eleven this morning - more fool me for clinging on to Equipe as a racing team for far too long - and loved it.

I find the plain Azed is usually tricky enough; the non-plain ones are an extra treat. What kind of a mind can create this and then decide it needs spicing up further by making the missing letters spell out a quotation?

I take my hat off.