Roll-call response in another environment (4)
I believe the answer is:
here
'roll-call response' is the definition.
(I've seen this in another clue)
'in another environment' is the wordplay.
'in' indicates a hidden word.
'HERE' can be found hidden inside 'another environment'.
(Other definitions for here that I've seen before include "The present location" , "At this stage" , ""___ be dragons" (old map inscription?)" , "To hand" , "In attendance" .)