Nationalist group gets in touch (7)
I believe the answer is:
patriot
'nationalist' is the definition.
(synonyms)
'group gets in touch' is the wordplay.
'group' becomes 'trio' (a group of three).
'gets in' means one lot of letters goes inside another.
'touch' becomes 'pat' (pat is a kind of touch).
'trio' placed inside 'pat' is 'PATRIOT'.
(Other definitions for patriot that I've seen before include "Country lover" , "Country-lover" , "One defends his country" , "One supporting country" , "Nationalist" .)