Say nothing: manage with knowledge that’s much reduced? (8)
I believe the answer is:
shrunken
'much reduced?' is the definition.
'shrunken' can be an answer for 'reduced?' (I've seen this before). I'm unsure of the 'much' bit.
'say nothing manage with knowledge' is the wordplay.
'say nothing' becomes 'sh' ('sh' is said to tell someone to say nothing).
'manage' becomes 'run' (both can mean to organise).
'with' says to put letters next to each other.
'knowledge' becomes 'ken' (ken is a kind of knowledge).
'sh'+'run'+'ken'='SHRUNKEN'
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for shrunken that I've seen before include "Having become smaller" , "Shrivelled, withered" , "Shun kern to be made small" , "Reduced" , "Withered, contracted" .)