Regatta crew (7)
I believe the answer is:
oarsmen
'regatta crew' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oarsmen that I've seen before include "They propel boats manually" , "Crew - moaners (anag)" , "Scullers" , "They propel a boat manually" , "Rowing types" .)