Pugnacious bachelor taking girl round Greek island (9)
I believe the answer is:
bellicose
'pugnacious' is the definition.
(synonyms)
'bachelor taking girl round greek island' is the wordplay.
'bachelor' becomes 'b' (abbreviation e.g. BA=Bachelor of Arts).
'taking' is a charade indicator (letters next to each other).
'girl' becomes 'ellie' ().
'round' indicates putting letters inside.
'greek island' becomes 'cos' (I've seen this before).
'ellie' placed around 'cos' is 'ellicose'.
'b'+'ellicose'='BELLICOSE'
(Other definitions for bellicose that I've seen before include "Not like lamb" , "Aggressive, looking for a fight" , "wanting fight" , "Belligerent" , "Aggressive and willing to fight" .)