Kid was rocking, did you say? (5)
I believe the answer is:
suede
'kid' is the definition.
(two terms for types of leather)
'was rocking did you say?' is the wordplay.
'was rocking' becomes 'swayed' (rock can mean to sway).
'did you say?' shows a homophone (sound like).
'swayed' is a homophone of 'SUEDE'.
(Other definitions for suede that I've seen before include "leather material" , "Soft goatskin" , "Undressed kidskin" , "Type of leather" , "Leather with flesh side rubbed to velvety nap" .)