Stuck in the past with a different circle (7)
I believe the answer is:
aground
'stuck in the past' is the definition.
'aground' can be an answer for 'stuck' (thesaurus). I am unsure of the 'in the past' bit.
'different circle' is the wordplay.
'different' becomes 'ag' (I am not sure about this - if you are sure you should believe this answer much more).
'circle' becomes 'round' (synonyms).
'ag'+'round'='AGROUND'
'with a' is the link.
Can you help me to learn more?
(Other definitions for aground that I've seen before include "having hit rock bottom, perhaps" , "out of water" , "Like a stranded ship" , "High and dry" , "on rocks, perhaps" .)