A record-spinner on American list must be flexible (10)
I believe the answer is:
adjustable
'flexible' is the definition.
(thesaurus)
'a record-spinner on american list' is the wordplay.
'a record spinner on' becomes 'adj' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'american' becomes 'us' (abbreviation for United States).
'list' becomes 'table' (I've seen this before).
'adj'+'us'+'table'='ADJUSTABLE'
'must be' is the link.
Can you help me to learn more?
(Other definitions for adjustable that I've seen before include "Able to be adapted" , "Modifiable" .)