Row with flipping concerning Italian (4)
I believe the answer is:
tier
'row' is the definition.
(a tier is a row of things)
'flipping concerning italian' is the wordplay.
'flipping' is a reversal indicator.
'concerning' becomes 're' (both can mean on a particular topic).
'italian' becomes 'it' (abbreviation for Italian).
're'+'it'='reit'
'reit' written backwards gives 'TIER'.
'with' is the link.
(Other definitions for tier that I've seen before include "One who secures" , "one doing Bond" , "Echelon" , "Row in theatre" , "band" .)