Thesaurus offering (7)
I believe the answer is:
synonym
'thesaurus offering' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for synonym that I've seen before include "Quick crossword clue" , "text with similar import" , "Word that can replace another in context" , "A word that can be interchanged with another" , "Alternative word" .)