Clothes a limb, inside convenience (8)
I believe the answer is:
garments
'clothes' is the definition.
(I know this)
'a limb inside convenience' is the wordplay.
'a limb' becomes 'arm' (arm is a kind of limb).
'inside' means one lot of letters goes inside another.
'convenience' becomes 'gents' (I've seen this before).
'arm' put within 'gents' is 'GARMENTS'.
(Other definitions for garments that I've seen before include "clothes" , "Articles of clothing" .)