Nothing seen in Manila (3)
I believe the answer is:
nil
'nothing' is the definition.
(eg nil is zero in football)
'in manila' is the wordplay.
'in' indicates a hidden word.
'NIL' can be found hidden inside 'manila'.
'seen' is the link.
(Other definitions for nil that I've seen before include "Score of nought" , "Latin zero" , "Nothing, no value" , "Nothing found in senility" , "Nothing, zilch" .)