Worker represents force and muscle, locally (4)
I believe the answer is:
beef
'muscle locally' is the definition.
'beef' can be an answer for 'muscle' (I've seen this before). I'm unsure of the 'locally' bit.
'worker represents force' is the wordplay.
I cannot really see how this works, but
'worker' could be 'bee' (a worker bee) and 'bee' is located in the answer.
'force' could be 'f' (symbol used in Physics e.g. f=ma) and 'f' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for beef that I've seen before include "Argument" , "Bovine flesh" , "Complain; meat" , "nickname of US State" , "Brawn; complaint" .)