Oscillate in loopy fashion — might it? (5,4)
I believe the answer is:
tesla coil
'might it?' is the definition.
I can't tell whether this definition defines the answer.
'oscillate in loopy fashion' is the wordplay.
'in loopy fashion' is an anagram indicator (a weird or loopy spelling).
'oscillate' with letters rearranged gives 'TESLA COIL'.
(Other definitions for tesla coil that I've seen before include "high voltage generator" , "A transformer" .)