Treacherous guys at work, perhaps stand to start strike (7)
I believe the answer is:
weasels
'treacherous guys' is the definition.
(weasel can mean a treacherous person)
'work perhaps stand to start strike' is the wordplay.
'work' becomes 'w' (physics abbreviation).
'perhaps stand' becomes 'easel' (easel is a type of stand).
'to' means one lot of letters go next to another.
'start' suggests taking the first letters.
The initial letter of 'strike' is 's'.
'w'+'easel'+'s'='WEASELS'
'at' is the link.
(Other definitions for weasels that I've seen before include "Sales we make of the animals" , "Stoat-like creatures" , "Carnivorous mammal with short legs and long body" , "vermin" , "Wee lass out with mammals" .)