Queen being grabbed by womaniser in court game (7)
I believe the answer is:
croquet
'game' is the definition.
(croquet is a kind of game)
'queen being grabbed by womaniser in court' is the wordplay.
'queen' becomes 'q' (abbreviation used in chess).
'being grabbed by' means one lot of letters goes inside another.
'womaniser' becomes 'roue' (historical term for a libertine or ladies' man).
'in' indicates putting letters inside.
'court' becomes 'ct' (abbreviation used in road names).
'q' going into 'roue' is 'roque'.
'roque' inserted inside 'ct' is 'CROQUET'.
(Other definitions for croquet that I've seen before include "Game with wooden balls, mallets and hoops" , "Game with balls and mallet" , "Mallet and hoop game" , "Outdoor game" , "... or possibly at this ball game" .)