Easygoing (7)
'easygoing' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for relaxed that I've seen before include "Without strain or anxiety" , "Free from tension or anxiety" , "Unstressed" , "Became less tense and more at ease" , "Made (a rule) less strict" .)
'easygoing' is the definition.
(synonyms)
This is all the clue.
(Other definitions for laid-back that I've seen before include "Easygoing and relaxed like cabal kid" , "Unhurried and relaxed" , "Ultra-cool!" , "Relaxed (colloq.)" .)