Yank on a group of collectibles (9)
I believe the answer is:
americana
'group of collectibles' is the definition.
I can't judge whether this definition defines the answer.
'yank on a' is the wordplay.
'yank' becomes 'american' (I've seen this in another clue).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'american'+'a'='AMERICANA'
Can you help me to learn more?
(Other definitions for americana that I've seen before include "Objects from the New World" , "Artefacts distinctive of the US" , "Wild West material?" , "Traditional music" , "items from US" .)