Murphy needs time to replace quiet boss (4)
I believe the answer is:
'boss' is the definition.
(both can mean a metal decoration)
'murphy needs time to replace quiet' is the wordplay.
I cannot quite understand how this works, but
'time' could be 't' (abbreviation) and 't' is found in the answer.
The remaining letters 'sud' is a valid word 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 stud that I've seen before include "Small jewellery item" , "Part of a football boot" , "Collar button or horse farm" , "who believes he can keep it up" , "A lot of horses" .)