Cincinnati MLB team (4)
I believe the answer is:
reds
'cincinnati mlb team' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reds that I've seen before include "Scarlet communists" , "These are not right" , "Left-wingers" , "Colourful communists" , "First snooker balls to be potted" .)