Leave the beau dancing with queen (8)
I believe the answer is:
bequeath
'leave' is the definition.
(I know that leave can be written as bequeath)
'the beau dancing with queen' is the wordplay.
'dancing with' indicates an anagram.
'queen' becomes 'Q' (chess abbreviation).
'the'+'beau'='thebeau'
'thebeau' anagrammed with 'q' can make 'BEQUEATH'.
(Other definitions for bequeath that I've seen before include "Hand down" , "Endow" , "Leave (after death)" , "Leave (estate or body)" , "Give posthumously" .)