Azed

[JF85]

Stuck with three letters to find :-(

12A. Strain wrong for toughened glass (5) I have silt-, but only the s and t are definite.

19A. Stiff points, with being returned got up mostly (6) mi-ros, only the r and s are certain.

6? Rock overturned a circus vehicle (4) - aga, only the g guaranteed.

[Lie-in King]

12a Silex - 'sile' (to strain) + 'x' (wrong) (?)

[Lie-in King]

19a Mucros - 'cum' (with, returned) + 'ros(e)' (mostly)

[JF85]

Blimey. I would never have got either of those.

That should give me the letters I need for the female name. Thank you, as ever.

[klazomaniac]

6 Biga ?

Gib (rock of Gibraltar) overturned = Big + a

A chariot (vehicle)

I'm not getting the Circus bit though.

[JF85]

Aargh! I like silex and mucros, but that neans I have 4D and / or 15 A wrong.

4D. Old harvesting tool, this cut around middle of cereals (5)

15A. Returning comments on school performance, head dropped e.g. irony.

I had sithe and trope, with the letter midway between h and p giving an l, but that would mean sithe having two wrong letters (apologies for anyone who doesn't have the full instructions)

[Calibax]

^used in Circus maximus for example

[klazomaniac]

Thanks Calibax. That would make sense if my offer is correct

[JF85]

Yeah, biga looks excellent, thank you both. Edging closer :-)

[iminoz]

4d. SIETH, alternative spelling