Evocative of European river ebbing fast (8)
I believe the answer is:
redolent
'evocative' is the definition.
(synonyms)
'european river ebbing fast' is the wordplay.
'european river' becomes 'oder' (River Oder in central Europe).
'ebbing' shows that the letters should be reversed in order (to ebb can mean to go backwards).
'fast' becomes 'lent' (Lent is a period of fasting in Christianity).
'oder' back-to-front is 'redo'.
'redo'+'lent'='REDOLENT'
'of' is the link.
(Other definitions for redolent that I've seen before include "Strongly reminiscent (of something)" , "Objective scented" , "odorous" , "Aromatic" , "Smelling of, evocative" .)