Unclear change that's reduced offer (6)
I believe the answer is:
turbid
'unclear' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?
'change that's reduced offer' is the wordplay.
'change' becomes 'turn' (turning is a kind of changing).
'that's reduced' means to remove the last letter.
'offer' becomes 'bid' (synonyms).
'turn' with its last letter taken off is 'tur'.
'tur'+'bid'='TURBID'
Can you help me to learn more?
(Other definitions for turbid that I've seen before include "Disordered" , "(Of liquid) cloudy" , "Dense, thick and cloudy" , "Muddy, murky, cloudy" , "Murky, clouded" .)