Seeing father on telly, moan in front of him (7)
I believe the answer is:
sighted
'seeing' is the definition.
(both mean able to see, as opposed to blind)
'father on telly moan in front of him' is the wordplay.
'father on telly' becomes 'ted' (Father Ted is a TV sitcom).
'moan' becomes 'sigh' (both can mean a distressed sound).
'in front of him' means one lot of letters go next to another.
'ted' put after 'sigh' is 'SIGHTED'.
(Other definitions for sighted that I've seen before include "Not blind" , "Seen" , "Glimpsed" , "Viewers are" , "Espied" .)