Body found in A&E ward finally collected (7)
I believe the answer is:
amassed
'collected' is the definition.
(I've seen this before)
'body found in ae ward finally' is the wordplay.
'body' becomes 'mass' (mass is a kind of body**).
'found in' indicates putting letters inside.
'finally' indicates one should take the final letters.
The final letter of 'ward' is 'd'.
'mass' put inside 'ae' is 'amasse'.
'amasse'+'d'='AMASSED'
(Other definitions for amassed that I've seen before include "Accumulated over time" , "Accumulated a great quantity" , "Collected" , "Got up" , "Gathered in great quantity" .)