This man invaded England (3)
I believe the answer is:
nor
'england' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'this man invaded' is the wordplay.
'this man' becomes 'N' (knight, a man in chess).
'invaded' becomes 'or' (I can't explain this - if you can you should believe this answer much more).
'n'+'or'='NOR'
Can you help me to learn more?
(Other definitions for nor that I've seen before include "Word paired with "neither"" , "In addition, not" , "Conjunction meaning 'and not'" , "Link word" , "Common conjunction, goes with neither" .)