Abolish European restriction confining sodium intake at last (9)
I believe the answer is:
eliminate
'abolish' is the definition.
(thesaurus)
'european restriction confining sodium intake at last' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'restriction' becomes 'limit' (I've seen this before**).
'confining' is an insertion indicator.
'sodium' becomes 'na' (chemical symbol).
'at last' suggests the final letters.
The last letter of 'intake' is 'e'.
'limit' going around 'na' is 'liminat'.
'e'+'liminat'+'e'='ELIMINATE'
(Other definitions for eliminate that I've seen before include "put out" , "Wipe out" , "waste" , "Cut out" , "Annihilate" .)