Organ stop in list (8)
I believe the answer is:
register
This clue is a double definition.
'organ stop' is the first definition.
(thesaurus)
'list' is the second definition.
(thesaurus)
'in' is the link.
(Other definitions for register that I've seen before include "Show" , "Enrol, to vote perhaps" , "Read" , "Official record of names etc." , "(Put one's name down on) list" .)