Is the Queen unable to cover an old music stand? (10)
I believe the answer is:
canterbury
'an old music stand?' is the definition.
(stand for holding sheet music)
'is the queen unable to cover' is the wordplay.
I cannot quite see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is located in the answer.
'queen' could be 'er' (abbreviation for Elizabeth Regina) and 'er' is present in the answer.
'cover' could be 'bur' (bur is a kind of cover) and 'bur' is found in the answer.
The remaining letters 'cany' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for canterbury that I've seen before include "Stand" , "Tellers of Chaucer's tales" , "where Becket fell" .)