Attempted to replant seed outside for instance (7)
I believe the answer is:
essayed
'attempted' is the definition.
('essay' can be a synonym of 'attempt')
'replant seed outside for instance' is the wordplay.
'replant' indicates anagramming the letters (I've seen this in other clues).
'outside' indicates putting letters inside.
'for instance' becomes 'say'.
'seed' anagrammed gives 'esed'.
'esed' going around 'say' is 'ESSAYED'.
'to' acts as a link.
(Other definitions for essayed that I've seen before include "Had a go" , "Attempted, strove" , "Made formal attempt" , "Tried (E, not A)" , "tested" .)