By way of; finished (7)
I believe the answer is:
through
This clue is a double definition.
'by way of' is the first definition.
(I've seen this before)
'finished' is the second definition.
(similar in meaning)
(Other definitions for through that I've seen before include "Non-stop - finished" , "From one end or side to the other" , "By means of; having finished a relationship" , "Per" , "made it to the next stage" .)