Rowing team made boast (4)
I believe the answer is:
crew
This clue might be a double definition.
'rowing' is the first definition.
(I know that rowing can be written as crew)
'team made boast' is the second definition.
'crew' can be an answer for 'team' (I've seen this before). I'm not sure about the 'made boast' bit.
Can you help me to learn more?
(Other definitions for crew that I've seen before include "Ship's company - bragged" , "Work party" , "This male hair style is closely cropped" , "was triumphant" , "Rowing team" .)