Small chocolate perhaps unwrapped (3)
I believe the answer is:
wee
'small' is the definition.
(similar in meaning)
'chocolate perhaps unwrapped' is the wordplay.
'chocolate perhaps' becomes 'sweet' (chocolate is a type of sweet).
'unwrapped' indicates the central letters (the letters which wrap the word are removed).
The centre of 'sweet' is 'WEE'.
(Other definitions for wee that I've seen before include "Small, like Willy Winkie" , "number one" , "Slash" , "Little or tiny in Scotland" , "Mini in Glasgow?" .)