City supporters having trouble getting back after international (8)
I believe the answer is:
brasilia
'city' is the definition.
(Brasilia is an example)
'supporters having trouble getting back after international' is the wordplay.
'supporters' becomes 'bras' (a bra gives support to breasts).
'having' is a charade indicator (letters next to each other).
'trouble getting back' becomes 'lia' (I can't justify this - if you can you should give a lot more credence to this answer).
'after' says to put letters next to each other.
'international' becomes 'i' (abbreviation eg in IMF).
'lia' after 'i' is 'ilia'.
'bras' next to 'ilia' is 'BRASILIA'.
(Other definitions for brasilia that I've seen before include "SA capital" , "11 [CAPITAL]" , "Capital city of Brazil" , "South American capital" .)