Enemy forces at the Front, combined, poured forth (7)
I believe the answer is:
effused
'poured forth' is the definition.
(I've seen this in another clue)
'enemy forces at the front combined' is the wordplay.
'at the front' suggests taking the first letters.
'combined' becomes 'fused' ('fuse' can be a synonym of 'combine').
The first letters of 'enemy forces' is 'ef'.
'ef'+'fused'='EFFUSED'
(Other definitions for effused that I've seen before include "spread out" , "Poured out" .)