Like worker crossing lake at an angle (6)
I believe the answer is:
aslant
'at an angle' is the definition.
(I've seen this before)
'like worker crossing lake' is the wordplay.
'like' becomes 'as'.
'worker' becomes 'ant' (worker is a type of ant).
'crossing' means one lot of letters goes inside another.
'lake' becomes 'l'.
'as'+'ant'='asant'
'asant' enclosing 'l' is 'ASLANT'.
(Other definitions for aslant that I've seen before include "oblique view" , "Skewed" , "Out of the vertical" , "not on the level" , "At an oblique angle" .)