Charge for tablet (7)
I believe the answer is:
lozenge
This clue is a double definition.
'charge' is the first definition.
(thesaurus)
'tablet' is the second definition.
(synonyms)
'for' acts as a link.
(Other definitions for lozenge that I've seen before include "Diamond shape - pastille" , "Rhombus; tablet" , "Medicine tablet" , "Medicated tablet" , "Medicated sweet" .)