Very angry in abattoir at Edgware (5)
I believe the answer is:
irate
'very angry' is the definition.
(I've seen this before)
'in abattoir at edgware' is the wordplay.
'in' indicates a hidden word.
'IRATE' is hidden in the letters of 'abattoir at edgware'.
(Other definitions for irate that I've seen before include "having got in wax" , "raging" , "Wild" , "Wrathful" , "Hacked off" .)