Approach a hundred at a price (6)
I believe the answer is:
accost
'approach' is the definition.
(thesaurus)
'a hundred at a price' is the wordplay.
'a hundred' becomes 'c' (roman numeral).
'at' is a charade indicator (letters next to each other) (I've seen this in other clues).
'price' becomes 'cost' ('cost' can be a synonym of 'price').
'c' after 'a' is 'ac'.
'ac'+'cost'='ACCOST'
(Other definitions for accost that I've seen before include "Approach boldly or impudently" , "Stop and pester" , "Make bold approach to" , "approach with menaces" , "Approach and address (someone) aggressively" .)