Try lake hideout to watch duck (9)
I believe the answer is:
goldeneye
'duck' is the definition.
(goldeneye is a kind of duck)
'try lake hideout to watch' is the wordplay.
'try' becomes 'go' (go is a kind of try).
'lake' becomes 'l'.
'hideout' becomes 'den' ('den' can be a synonym of 'hideout').
'to watch' becomes 'eye' (I've seen this before).
'go'+'l'+'den'+'eye'='GOLDENEYE'
(Other definitions for goldeneye that I've seen before include "spy film" , "Northern diving duck - 1995 Bond film" .)