Abroad, suitable firm (6)
I believe the answer is:
outfit
'firm' is the definition.
(thesaurus)
'abroad suitable' is the wordplay.
'abroad' becomes 'out' (I've seen this before).
'suitable' becomes 'fit' ('fit' can be similar in meaning to 'suitable').
'out'+'fit'='OUTFIT'
(Other definitions for outfit that I've seen before include "Team" , "Set of clothes or group of people" , "Organistion or set of clothing" , "Cohesive unit, eg a military company" , "Garb - equipment" .)