Students absorbed by ecstasy trip (5)
I believe the answer is:
jolly
'trip' is the definition.
(I've seen this before)
'students absorbed by ecstasy' is the wordplay.
'students' becomes 'LL' (two abbreviations for learner).
'absorbed by' indicates putting letters inside.
'ecstasy' becomes 'joy' (I've seen this in another clue).
'll' inserted within 'joy' is 'JOLLY'.
(Other definitions for jolly that I've seen before include "' - - boating weather' (song)" , "Very pleasurable" , "all-expenses-paid trip" , "Good-humoured, cheerful" , "Expression denoting hearty, sporting type of girl" .)