Roman’s a new rower (7)
I believe the answer is:
oarsman
'rower' is the definition.
(I know that oarsman is a type of rower)
'roman's a new' is the wordplay.
'new' indicates anagramming the letters.
'romans'+'a'='romansa'
'romansa' with letters rearranged gives 'OARSMAN'.
(Other definitions for oarsman that I've seen before include "He rows" , "One in a row" , "It's bordered by Libya and France" , "A male small boat propeller" , "Member of rowing crew" .)