Duck taking drink on lake (4)
I believe the answer is:
teal
'duck' is the definition.
(teal is a kind of duck)
'drink on lake' is the wordplay.
'drink' becomes 'tea' (tea is a kind of drink**).
'on' says to put letters next to each other.
'lake' becomes 'l'.
'tea'+'l'='TEAL'
'taking' is the link.
(Other definitions for teal that I've seen before include "Species of duck" , "Type of duck" , "Bluish shade of green" , "Raise (subject matter)" , "Duck; greenish-blue colour" .)