Silver circular that has hit bottom (7)
I believe the answer is:
aground
'hit bottom' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'silver circular that has' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'circular' becomes 'round' (synonyms).
'that has' means one lot of letters go next to another.
'ag'+'round'='AGROUND'
Can you help me to learn more?
(Other definitions for aground that I've seen before include "(Of ship) not floating" , "On guard (anag.)" , "having hit rock bottom, perhaps" , "Beached" , "on the bed" .)