The sharp way to get electricity free! (5)
I believe the answer is:
acrid
'the sharp' is the definition.
(I've seen this before)
'electricity free' is the wordplay.
'electricity' becomes 'AC' (AC is an example).
'free' becomes 'rid' (to be free of something is to be rid of it).
'ac'+'rid'='ACRID'
'way to get' acts as a link.
(Other definitions for acrid that I've seen before include "Stinging" , "Painfully pungent" , "Tart" , "irritating" , "Pungent or sharp, like smoke" .)