Soldiers hurt came to (7)
I believe the answer is:
reached
'came to' is the definition.
(to come to is to reach or arrive at)
'soldiers hurt' is the wordplay.
'soldiers' becomes 'RE' (Royal Engineers).
'hurt' becomes 'ached' (I've seen this before).
're'+'ached'='REACHED'
(Other definitions for reached that I've seen before include "Attained" , "Cad here (anag.)" , "Came to (a place)" , "Stretched or arrived" .)