Withdraw Home Counties game against good Roma (7)
I believe the answer is:
gypsies
'roma' is the definition.
(both can mean Romani people)
'withdraw home counties game against good' is the wordplay.
'withdraw' says the letters should be written backwards.
'home counties' becomes 'se' (Home Counties in the South East of England).
'game' becomes 'ispy' (I Spy is a guessing game).
'against' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'se'+'ispy'='seispy'
'seispy' backwards is 'ypsies'.
'ypsies' put after 'g' is 'GYPSIES'.
(Other definitions for gypsies that I've seen before include "Romanies" , "Travellers" , "Travelling people in Europe" .)