Word of advice: put on favourite scarf (6)
I believe the answer is:
tippet
'scarf' is the definition.
(I've seen this in another clue)
'word of advice put on favourite' is the wordplay.
'word of advice' becomes 'tip' (I've seen this in another clue).
'put on' says to put letters next to each other.
'favourite' becomes 'pet' (synonyms).
'tip'+'pet'='TIPPET'
(Other definitions for tippet that I've seen before include "Cape for neck and shoulder" , "Gratuity and dear one make an old sort of cape" , "Gratuity to a dear one to find a cape" , "Small collar of fur with ends hanging in front" , "Woman's fur shoulder-wrap" .)