Pinhead bound to be easily bent (7)
I believe the answer is:
pliable
'be easily bent' is the definition.
(I've seen this before)
'pinhead bound' is the wordplay.
I cannot really see how this works, but
'pinhead' could be 'p' (head letter of 'pin') and 'p' is present in the answer.
The remaining letters 'liable' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for pliable that I've seen before include "accommodating" , "Flexible" , "Easily bent" , "easily influenced" , "Elastic" .)