I deployed sonic cleaner finally for tooth (7)
I believe the answer is:
incisor
'tooth' is the definition.
(incisor is a kind of tooth)
'i deployed sonic cleaner finally' is the wordplay.
'deployed' indicates anagramming the letters.
'finally' suggests the final letters.
The last letter of 'cleaner' is 'r'.
'sonic' with letters rearranged gives 'nciso'.
'i'+'nciso'+'r'='INCISOR'
'for' acts as a link.
(Other definitions for incisor that I've seen before include "cutter" , "Front tooth" , "Chisel-edged tooth" , "carnivore requires?" , "companion could be Goofy" .)