Row over new type of cloth (5)
I believe the answer is:
linen
'type of cloth' is the definition.
(I've seen this before)
'row over new' is the wordplay.
'row' becomes 'line' (as in a row of things).
'over' is a charade indicator (letters next to each other).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'line'+'n'='LINEN'
(Other definitions for linen that I've seen before include "clothes and sheets" , "Lenin (anag) -- fabric" , "Tablecloth material" , "Fabric from the fibres of the flax plant" , "Holland, say" .)