Look always beyond lake (4)
I believe the answer is:
leer
'look' is the definition.
(leer is a kind of look)
'always beyond lake' is the wordplay.
'always' becomes 'eer' (poetic way of saying ever).
'beyond' means one lot of letters go next to another.
'lake' becomes 'l'.
'eer' after 'l' is 'LEER'.
(Other definitions for leer that I've seen before include "Look suggestively" , "Lewd look" , "unpleasant look" , "Ogle, smirk" , "Suggestive or sneering look" .)