Got to love The Queen in the sack (8)
I believe the answer is:
bothered
'got to' is the definition.
('bother' can be a synonym of 'get to')
'love the queen in the sack' is the wordplay.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'in the' means one lot of letters goes inside another.
'sack' becomes 'bed' ('in the sack' means 'in bed').
'o'+'the'+'r'='other'
'other' going into 'bed' is 'BOTHERED'.
(Other definitions for bothered that I've seen before include "Hot and exasperated" , "Old song: 'Bewitched, . . . . . . . . and bewildered'" , "Took the trouble to do something" , "''Bewitched, ... and bewildered'' (song) (8)" , "Disturbed" .)