Refuse to be moved and he could receive summons! (7)
I believe the answer is:
dustman
'refuse to be moved and he could receive summons' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he could receive summons' is the wordplay.
I cannot really see how this works, but
'he' could be 'man' (I've seen this in another clue) and 'man' is present in the answer.
The remaining letters 'dust' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for dustman that I've seen before include "Refuse worker" , "Rubbish collector" , "Refuse collector" , "Garbage collector" , "Bin emptier" .)