Show interest in retro turn recording covers (3,2)
I believe the answer is:
eye up
'show interest in' is the definition.
'retro turn recording covers' is the wordplay.
'retro' shows that the letters should be reversed in order (retro is Latin for 'backwards').
'turn' becomes 'uey' (Australian slang for a U-turn**).
'recording' becomes 'ep' (extended play vinyl record).
'covers' indicates putting letters inside.
'uey' backwards is 'yeu'.
'yeu' placed within 'ep' is 'EYE UP'.
(Other definitions for eye up that I've seen before include "study" , "Examine closely" , "Look at (someone) as a potential partner" , "Eagerly watch" , "Check out" .)