Sheep needs servant, as elephant may (7)
I believe the answer is:
rampage
'as elephant may' is the definition.
(an elephant might rampage around)
'sheep needs servant' is the wordplay.
'sheep' becomes 'ram' (ram is a kind of sheep).
'needs' is a charade indicator (letters next to each other).
'servant' becomes 'page' (I've seen this before).
'ram'+'page'='RAMPAGE'
(Other definitions for rampage that I've seen before include "Violent disorder" , "Violent action" , "Rush about wildly in par game" , "Run amok" , "Run wild" .)