Rowers were triumphant (4)
I believe the answer is:
crew
I believe this clue is a double definition.
'rowers' is the first definition.
'were triumphant' is the second definition.
(I've seen this before)
(Other definitions for crew that I've seen before include "Sailors - haircut" , "They operate ships or aircraft, say" , "Cox and Co" , "A kind of short cut" , "Ship's company - bragged" .)