Senior general wrong to capture unknown soldiers (5,9)
I believe the answer is:
royal engineers
'soldiers' is the definition.
Both the answer and definition are plural nouns.
Perhaps they are linked in a way I don't understand?
'senior general wrong to capture unknown' is the wordplay.
'wrong' indicates an anagram.
'to capture' is an insertion indicator.
'unknown' becomes 'y' (algebra).
'senior'+'general'='seniorgeneral'
'seniorgeneral' anagrammed gives 'roalengineers'.
'roalengineers' enclosing 'y' is 'ROYAL ENGINEERS'.
Can you help me to learn more?
(Other definitions for royal engineers that I've seen before include "Technical corps" , "British Army Corps" , "Losing side in first FA cup final" .)