Unexpected result, winning over group of people (5)
I believe the answer is:
upset
'unexpected result' is the definition.
(I've seen this before)
'winning over group of people' is the wordplay.
'winning' becomes 'up' (eg being up at half time in football).
'over' says to put letters next to each other (in a down clue, some letters go over others).
'group of people' becomes 'set' (eg a social set).
'up'+'set'='UPSET'
(Other definitions for upset that I've seen before include "Distressed; overturn" , "Unexpected defeat - tipped over" , "dismay" , "'Disturbed, agitated (5)'" , "Overturn - worry" .)