... free, when retail use has been reviewed (2,7)
I believe the answer is:
at leisure
'free' is the definition.
(I've seen this before)
'retail use has been reviewed' is the wordplay.
'retail use' can be anagrammed to 'AT LEISURE'.
But, I'm unsure how the anagram is indicated.
'when' is the link.
Can you help me to learn more?
(Other definitions for at leisure that I've seen before include "In an unhurried manner" , "resting" , "in an unhurried fashion" , "Relaxing, not working" , "No hurry, having a rest" .)