A great curved shape found in a stranded condition (7)
I believe the answer is:
aground
'in a stranded condition' is the definition.
I can't tell whether this defines the answer.
'a great curved shape' is the wordplay.
'great' becomes 'G' (abbreviation in place names).
'curved shape' becomes 'round' (round shape is a kind of shape. I am not sure about the 'curved' bit.).
'a'+'g'+'round'='AGROUND'
'found' acts as a link.
Can you help me to learn more?
(Other definitions for aground that I've seen before include "out of water" , "having hit rock bottom, perhaps" , "on the bed" , "Like a stranded ship" , "Beached" .)