Dish one street that’s corrupt (9)
I believe the answer is:
dishonest
'corrupt' is the definition.
('dishonest' is associated in meaning with 'corrupt')
'dish one street' is the wordplay.
'street' becomes 'st'.
'dish'+'one'+'st'='DISHONEST'
'that's' acts as a link.
(Other definitions for dishonest that I've seen before include "Deceitful - hedonists (anag)" , "Not trustworthy" , "Corrupt" , "Not true!" , "Untrustworthy" .)