Brighton and Hove Albion FC mostly play in Russia (3,7)
I believe the answer is:
the seagull
'play in russia' is the definition.
'the seagull' can be an answer for 'play' (I've seen this before). I'm not sure about the 'in russia' bit.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for the seagull that I've seen before include "goes right over a person's head?" , "Russian play" , "Chekhov play" .)