Designed for youth leader in street, guided (6)
I believe the answer is:
styled
'designed' is the definition.
(styling is a kind of designing)
'youth leader in street guided' is the wordplay.
'youth leader' becomes 'y' (I've seen this in other clues).
'in' indicates putting letters inside.
'street' becomes 'st' (abbreviation).
'guided' becomes 'led' (similar in meaning).
'st'+'led'='stled'
'y' going within 'stled' is 'STYLED'.
'for' is the link.
(Other definitions for styled that I've seen before include "Designed, arranged" , "Fashioned" , "Called; (hair) shaped" , "Designed; designated" .)