Handle nice surprise (5)
I believe the answer is:
treat
This clue is a double definition.
'handle' is the first definition.
(I know that handle can be written as treat)
'nice surprise' is the second definition.
(I've seen this before)
(Other definitions for treat that I've seen before include "Practise medicine" , "Handle; dainty" , "Enjoyable surprise gift" , "Minister - buy one a drink" , "Give care to; surprise gift" .)