Volunteer troops made rough manoeuvres (4,5)
I believe the answer is:
home guard
'volunteer troops' is the definition.
The definition suggests a singular noun which matches the answer.
'made rough manoeuvres' is the wordplay.
'manoeuvres' indicates an anagram (letters manoeuvred in a new way).
'made'+'rough'='maderough'
'maderough' is an anagram of 'HOME GUARD'.
Can you help me to learn more?
(Other definitions for home guard that I've seen before include "Dad's Army" , "Volunteer force" , "Last line of defence in World War II" , "World War Two defence organisation" , "security force" .)