A hat to start queuing for? (5)
I believe the answer is:
toque
'a hat' is the definition.
(toque is a kind of hat)
'to start queuing for?' is the wordplay.
'start' indicates taking the first letters.
'for?' becomes 'ue' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The first letter of 'queuing' is 'q'.
'to'+'q'+'ue'='TOQUE'
Can you help me to learn more?
(Other definitions for toque that I've seen before include "Small brimless hat" , "Close-fitting hat" , "Sri Lankan monkey" , "Woman's round, brimless hat" , "Turban" .)