Another chance to play soldiers with mate (7)
I believe the answer is:
rematch
'another chance to play' is the definition.
(another game with a previous opponent)
'soldiers with mate' is the wordplay.
'soldiers' becomes 'RE' (Royal Engineers).
'with' says to put letters next to each other.
'mate' becomes 'match' (synonyms).
're'+'match'='REMATCH'
(Other definitions for rematch that I've seen before include "Further engagement of the same contestants" , "Later encounter" , "Another game" , "Return fixture" , "Teams' second game" .)