Note learner blocking ski slope gets the message (7)
I believe the answer is:
epistle
'the message' is the definition.
(thesaurus)
'note learner blocking ski slope' is the wordplay.
'note' becomes 'e' (musical note).
'learner' becomes 'l'.
'blocking' means one lot of letters goes inside another.
'ski slope' becomes 'piste' (I've seen this before).
'l' going inside 'piste' is 'pistle'.
'e'+'pistle'='EPISTLE'
'gets' acts as a link.
(Other definitions for epistle that I've seen before include "A letter, biblical perhaps" , "Missive; letter" , "Long formal letter (found in the New Testament?)" , "screed" , "communication" .)