Suit may be thus taken off, gently going on peg (10)
I believe the answer is:
pinstriped
'taken off gently going on peg' is the definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs sometimes define each other.
'suit may be thus' is the wordplay.
'suit' becomes 'pinstripe' (I've seen this before).
'may be thus' becomes 'd' (I can't explain this - if you can you should believe this answer much more).
'pinstripe'+'d'='PINSTRIPED'
Can you help me to learn more?
(Other definitions for pinstriped that I've seen before include "such a suit" , "sort of material" .)