Row about it is recalled (4)
I believe the answer is:
tier
'row' is the definition.
(a tier is a row of things)
'about it is recalled' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'is recalled' shows that the letters should be reversed in order (to recall can mean to bring something back).
're'+'it'='reit'
'reit' back-to-front is 'TIER'.
(Other definitions for tier that I've seen before include "Layer, rank" , "Row, layer" , "Level - layer" , "he hasn't won?" , "Row, level" .)