Pass on to posterity that the worker has fallen (4,4)
I believe the answer is:
hand down
'pass on' is the definition.
(handing down is a kind of passing on)
'posterity that the worker has fallen' is the wordplay.
I cannot really understand how this works, but
'worker' could be 'hand' (hand is a kind of worker) and 'hand' is located in the answer.
The remaining letters 'down' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Another definition for hand down that I've seen is " Issue (judgment); bequeath".)