Ann and Rees disguised trap (7)
I believe the answer is:
ensnare
'trap' is the definition.
(I've seen this before)
'ann and rees disguised' is the wordplay.
'and' means one lot of letters go next to another.
'disguised' indicates anagramming the letters.
'ann'+'rees'='annrees'
'annrees' with letters rearranged gives 'ENSNARE'.
(Other definitions for ensnare that I've seen before include "Ambush" , "Capture, trap" , "Ecstatic expression of feeling" , "Catch as if in a trap or net" .)