Hard work loading flyers into posh car (5)
I believe the answer is:
graft
'hard work' is the definition.
(graft can mean working hard)
'loading flyers into posh car' is the wordplay.
I cannot really understand how this works, but
'flyers' could be 'raf' (Royal Air Force) and 'raf' is present in the answer.
'car' could be 't' and 't' is found within the answer.
A single letter 'g' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for graft that I've seen before include "Surgical transplant" , "Hard work; bribery" , "Transplant - hard work" , "Slip" , "Transfer of tissue - hard work!" .)