Gift paper maybe will revolutionise any present at the outset (4)
I believe the answer is:
wrap
'gift paper maybe' is the definition.
(as in wrapping paper)
'will revolutionise any present at the outset' is the wordplay.
'at the outset' indicates taking the first letters.
The first letters of 'will revolutionise any present' is 'WRAP'.
(Other definitions for wrap that I've seen before include "Cover in paper" , "Envelop" , "Pack in paper; shawl" , "Cover a gift" , "Finish recording; filled tortilla" .)