Provide with ecstasy at university, at last (5)
I believe the answer is:
endue
'provide with' is the definition.
(I've seen this in another clue)
'ecstasy at university at last' is the wordplay.
'ecstasy' becomes 'E' (informal term for the drug).
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'university' becomes 'U' (abbreviation as in UMass).
'at' means one lot of letters go next to another (I've seen this in other clues).
'last' becomes 'end' (I've seen this in another clue).
'u' put after 'end' is 'endu'.
'e' put after 'endu' is 'ENDUE'.
(Other definitions for endue that I've seen before include "Furnish" , "Supply or provide" , "Endow (with a quality)" , "Invest (something) with a quality or ability" , "Invest - provide" .)