Apply colour that’s fashionable time after time (4)
I believe the answer is:
tint
'apply colour' is the definition.
I can't judge whether this defines the answer.
'fashionable time after time' is the wordplay.
'fashionable' becomes 'in' (in can mean fashionable or trendy).
'time' becomes 't' (abbreviation).
'after' is a charade indicator (letters next to each other).
'time' becomes 't' (abbreviation).
'in'+'t'='int'
'int' put after 't' is 'TINT'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for tint that I've seen before include "Hue, shade" , "Shade; colour slightly" , "A slight shade of colour" , "'Shade, tone (4)'" , "A slighth shade of colour" .)