Cool kid without current support (4-4)
I believe the answer is:
laid-back
'cool' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I don't see?
'kid without current support' is the wordplay.
'kid' becomes 'lad' (lad can mean a boy or young man).
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'current' becomes 'I' (physics symbol).
'support' becomes 'back' (to back is to support or endorse).
'lad' enclosing 'i' is 'laid'.
'laid'+'back'='LAID-BACK'
Can you help me to learn more?
(Other definitions for laid-back that I've seen before include "Ultra-cool!" , "Unhurried and relaxed" , "Easygoing and relaxed like cabal kid" , "Relaxed (colloq.)" .)