Work group given some reward by the company head (4)
I believe the answer is:
crew
'work group' is the definition.
(I've seen this in another clue)
'some reward by the company head' is the wordplay.
'some reward' becomes 'rew' (I can't explain this - if you can you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'head' suggests taking the first letters.
The initial letter of 'company' is 'c'.
'rew' after 'c' is 'CREW'.
'given' acts as a link.
Can you help me to learn more?
(Other definitions for crew that I've seen before include "Sailor complement of ship" , "A kind of short cut" , "Boat race team" , "Personnel (on ship perhaps?)" , "made triumphalist noises" .)