Switch without current, not enough to run (7)
I believe the answer is:
scamper
'run' is the definition.
(scampering is a kind of running)
'switch without current not enough' is the wordplay.
I cannot quite understand how this works, but
'current' could be 'amp' (electricity) and 'amp' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for scamper that I've seen before include "Run with quick light steps" , "Scurry, scuttle" , "Skip about briskly" , "Beetle" , "Proceed hurriedly" .)