A new road is shortly to be built by him (6)
I believe the answer is:
andrew
'a new road is shortly to be built by him' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'a new road is shortly to be built by him' is the wordplay.
I cannot really see how this works, but
'a' could be 'an' and 'an' is found within the answer.
'him' could be 'drew' and 'drew' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for andrew that I've seen before include "Nov thirtieth this saint's day" , "- - Marr (TV)" , "Wander (anag)" , "Peter's brother" , "Royal prince" .)