Crush strangely alert MP (7)
I believe the answer is:
trample
'crush' is the definition.
(I've seen this in another clue)
'strangely alert mp' is the wordplay.
'strangely' indicates anagramming the letters.
'alert'+'mp'='alertmp'
'alertmp' is an anagram of 'TRAMPLE'.
(Other definitions for trample that I've seen before include "Ruthlessly crush -- nut performed a lot (anag)" , "Encroach with violence" , "Heedlessly tread down" , "Tread on, crush" , "Step on" .)