Restaurant row about turnover (5)
I believe the answer is:
diner
'restaurant' is the definition.
(diner is a kind of restaurant)
'row about turnover' is the wordplay.
'row' becomes 'din' (both can mean a loud disturbance).
'about' becomes 're' ('re' means regarding or about).
'turnover' is a reversal indicator (the letters turn over).
're' backwards is 'er'.
'din'+'er'='DINER'
(Other definitions for diner that I've seen before include "American restaurant" , "American cafe" , "Restaurant customer" , "one at banquet?" , "(Person eating in) restaurant" .)