Rowers floundering in San Remo (7)
I believe the answer is:
oarsmen
'rowers' is the definition.
('oarsman' can be a synonym of 'rower')
'floundering in san remo' is the wordplay.
'san remo' can be anagrammed to 'OARSMEN'.
Though, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for oarsmen that I've seen before include "Strokes" , "A sermon about rowers" , "People in boats" , "Male propellers of boats" , "They row the boat" .)