Star to write quotation on pack (9)
I believe the answer is:
pentagram
'star' is the definition.
(pentagram is a kind of star)
'write quotation on pack' is the wordplay.
'write' becomes 'pen' (synonyms).
'quotation' becomes 'tag' (I've seen this before).
'on' is a charade indicator (letters next to each other).
'pack' becomes 'ram' (synonyms).
'pen'+'tag'+'ram'='PENTAGRAM'
'to' is the link.
(Other definitions for pentagram that I've seen before include "Mystical symbol" , "Five pointed star" , "magical symbol" , "Star-shaped figure" , "Five-pointed star" .)