Bridge partners at table drinking pop (4)
I believe the answer is:
span
'bridge' is the definition.
(I know that bridge can be written as span)
'partners at table drinking pop' is the wordplay.
'partners at table' becomes 'SN' (South and North are partners in bridge).
'drinking' is an insertion indicator (inserted letters are consumed or drunk).
'pop' becomes 'pa' (both can mean father).
'sn' placed around 'pa' is 'SPAN'.
(Other definitions for span that I've seen before include "Section of bridge" , "Full extent end to end" , "too short for the foot" , "Hand's width" , "Extend across, bridge" .)