A bishop trapped by two men in tangled vegetation (9)
I believe the answer is:
chaparral
'tangled vegetation' is the definition.
(chaparral means vegetation)
'a bishop trapped by two men' is the wordplay.
'two men' can mean two substitutions for 'man'.
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'trapped by' indicates putting letters inside.
'man' becomes 'chap' (I've seen this in other clues).
'man' becomes 'Al' (man's name).
'a'+'rr'='arr'
'chap'+'al'='chapal'
'arr' inserted within 'chapal' is 'CHAPARRAL'.
'in' acts as a link.
(Other definitions for chaparral that I've seen before include "US growth area" , "thicket" .)