Seedy as could be getting tried (7)
I believe the answer is:
essayed
'tried' is the definition.
('essay' can be a synonym of 'try')
'seedy as could be' is the wordplay.
'could be' indicates anagramming the letters.
'seedy'+'as'='seedyas'
'seedyas' anagrammed gives 'ESSAYED'.
'getting' acts as a link.
(Other definitions for essayed that I've seen before include "Made formal attempt" , "Had a go" , "Attempted, strove" , "Attempted, tried" , "Attempted, endeavoured" .)