Court's disputatious figure once dropping ecstasy with mere criminal (7)
I believe the answer is:
mcenroe
'court's disputatious figure' is the definition.
I know nothing about this answer so I can't judge whether this works.
'once dropping ecstasy with mere criminal' is the wordplay.
'dropping' suggests deleting specific letters.
'ecstasy' becomes 'E' (informal term for the drug).
'with' means one lot of letters go next to another.
'criminal' indicates anagramming the letters.
'once' with 'e' taken out is 'onc'.
'onc' put after 'mere' is 'mereonc'.
'mereonc' is an anagram of 'MCENROE'.
Can you help me to learn more?
(Other definitions for mcenroe that I've seen before include "he's noted for being controversial" , "John --, US tennis player" , "Tennis star" .)