Document what one might do with one's hair? (6)
I believe the answer is:
'document' is the definition.
(permit is a kind of document)
'what one might do with one's hair?' is the wordplay.
I cannot quite see how this works, but
'one' could be 'i' (roman numeral) and 'i' is found in the answer.
'hair?' could be 'perm' (perm is a kind of hair) and 'perm' is found within the answer.
A single letter 't' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for permit that I've seen before include "Warrant", "Allow, authorise", "Allow - visa", "Allow, sanction", "Let - pass".)