English vice-president rearing grouse (5)
I believe the answer is:
peeve
'grouse' is the definition.
(I've seen this before)
'english vice-president rearing' is the wordplay.
'english' becomes 'e' (abbreviation).
'vice-president' becomes 'veep' (I've seen this before).
'rearing' says the letters should be written backwards (as in a horse rearing up).
'e'+'veep'='eveep'
'eveep' in reverse letter order is 'PEEVE'.
(Other definitions for peeve that I've seen before include "Cause annoyance" , "Cause to be annoyed, irritated, or resentful" , "grouse" , "Annoy, get at, irritate" , "upset" .)