Crash into servant in storm (7)
I believe the answer is:
rampage
'storm' is the definition.
(thesaurus)
'crash into servant' is the wordplay.
'crash into' becomes 'ram' (I've seen this before).
'servant' becomes 'page' (I've seen this before).
'ram'+'page'='RAMPAGE'
'in' acts as a link.
(Other definitions for rampage that I've seen before include "Go berserk" , "Rush about wildly in par game" , "Storm" , "Violent rush" , "A mad rush" .)