Write in a way that's jaded (5)
I believe the answer is:
spent
'jaded' is the definition.
(thesaurus)
'write in a way' is the wordplay.
'write' becomes 'pen' (synonyms).
'in' means one lot of letters goes inside another.
'a way' becomes 'st' (abbreviation for street).
'pen' put into 'st' is 'SPENT'.
'that's' acts as a link.
(Other definitions for spent that I've seen before include "Burned-out" , "Exhausted, having paid money?" , "(Of resources) exhausted" , "Worn Out, exhausted" , "Expended" .)