A second worker crosses line at an angle (6)
I believe the answer is:
aslant
'at an angle' is the definition.
(I've seen this before)
'a second worker crosses line' is the wordplay.
'a second' becomes 'as' (I've seen this in other clues**).
'worker' becomes 'ant' (worker is a type of ant).
'crosses' means one lot of letters goes inside another.
'line' becomes 'l'.
'as'+'ant'='asant'
'asant' placed around 'l' is 'ASLANT'.
(Other definitions for aslant that I've seen before include "Skewed" , "in oblique fashion" , "on a slope" , "oblique view" , "Leaning; out of plumb" .)