Silence the Spanish following support (5)
I believe the answer is:
shelf
'support' is the definition.
(shelf is a kind of support)
'silence the spanish following' is the wordplay.
'silence' becomes 'sh' (I've seen this in other clues).
'the spanish' becomes 'el'.
'following' becomes 'f' (used when citing page numbers etc).
'sh'+'el'+'f'='SHELF'
(Other definitions for shelf that I've seen before include "Rock ledge; underwater bank" , "Sill" , "Storage ledge" , "Horizontal surface to put things on" , "sort of life" .)