A man of scruples as far as physics are concerned! (9)
I believe the answer is:
dispenser
'scruples as far as physics are concerned' is the definition.
I can't tell whether this defines the answer.
'a man' is the wordplay.
I cannot quite understand how this works, but
'man' could be 'spenser' and 'spenser' is present in the answer.
The remaining letters 'di' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for dispenser that I've seen before include "Container releasing its contents in prescribed amounts" , "One filling prescription" , "Pharmacist" , "one to give out" , "Chemist" .)