Azed Parsing Help Please

[JJ109]

10d Part of cabin aft is remaining when _ _? (5)
(NB Those _ _ are part of the clue)
I have AIS?E, and believe all the letters are correct.

[JJ109]

Bumping up - can anybody put me out of my misery please!

[elliemay1]

only a guess:
aisle=part of cabin
(dr)aft=ale
'is' inside 'ale'

[JJ109]

Thanks Elliemay and Murdo. Same as me, I can get parts of it, but not the complete parse

[Mamyalynne]

Following on from Murdo's parse.....

Remaining is 'Left' which could give the 'le' but I can't see an indication to halve the word.

[JJ109]

Thanks Mamyalynne - do you think the two _ _ mean take the first two letters of left? Not a very satisfactory clue if that is the case.

[Mamyalynne]

It's possible but as you say poor.

Will keep thinking.

[JJ109]

Thanks - but it has already driven me up the wall - don't let it do the same to you!

[aelmpvw]

i think _ _ means minus two

[Mamyalynne]

I'm up the wall and across the ceiling most days.

[JJ109]

Man thanks to everybody. It is difficult to pick a best answer s everybody has helped equally. Therefore I have given it to Mamy in the hopes it will get her off the ceiling!

[mahonia]

Part of cabin aft is remaining (left) when AISLE. Parsing: AFT IS = anagram of LEFT IS when "A" is "LE"