Enthusiastic about (4,2)
'enthusiastic about' is the definition.
(I've seen this in another clue)
This is the entire clue.
'enthusiastic about' is the definition.
(into can mean interested in or enthusiastic about)
This is the entire clue.
(Other definitions for into that I've seen before include "To a position within" , "Taking an active and lively interest (in something)" , "Involved with" , "digging" , "Keenly interested in" .)