Relieved by cultivating a seed (5)
I believe the answer is:
eased
'relieved' is the definition.
(easing is a kind of relieving)
'cultivating a seed' is the wordplay.
'cultivating' indicates anagramming the letters.
'a'+'seed'='aseed'
'aseed' with letters rearranged gives 'EASED'.
'by' is the link.
(Other definitions for eased that I've seen before include "Made less hard" , "Calmed" , "Allayed" , "Moved carefully" , "Made less difficult or trying" .)