Fashionable to arrive with salary (6)
I believe the answer is:
income
'salary' is the definition.
(I've seen this before)
'fashionable to arrive' is the wordplay.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'to arrive' becomes 'come' ('come' can be a synonym of 'arrive').
'in'+'come'='INCOME'
'with' acts as a link.
(Other definitions for income that I've seen before include "Money coming in" , "Money earned" , "See 12" , "Money received for work or from investment" , "Salary" .)