To greet thus will astound the workers (5,5)
I believe the answer is:
shake hands
'to greet' is the definition.
(shaking hands is a kind of greeting)
'thus will astound the workers' is the wordplay.
I cannot really understand how this works, but
'workers' could be 'hands' (hand is a kind of worker) and 'hands' is found within the answer.
The remaining letters 'shake' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for shake hands that I've seen before include "Greet" , "Finalise agreement" .)