He's cut short, so there's some silence (3)
I believe the answer is:
len
'he's cut short so' is the definition.
The definition suggests a singular noun which matches the answer.
'some silence' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'LEN'' is hidden within 'silence'.
'there's' acts as a link.
Can you help me to learn more?
(Other definitions for len that I've seen before include "Boy" , "Sir - - Hutton" , "- - Hutton, cricketer" , "-- Deighton, author" , "Leonard (dim.)" .)