Rested, then left to get help (4)
I believe the answer is:
laid
'rested' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
'left to get help' is the wordplay.
'left' becomes 'l' (common abbreviation).
'to get' is a charade indicator (letters next to each other).
'help' becomes 'aid' (synonyms).
'l'+'aid'='LAID'
'then' is the link.
Can you help me to learn more?
(Other definitions for laid that I've seen before include "Produced eggs" , "(Of dining table) set" , "Deposited" , "tables may be?" , "Doze" .)