Got larger plug rewired partially (4)
I believe the answer is:
grew
'got larger' is the definition.
(I've seen this before)
'plug rewired partially' is the wordplay.
'partially' indicates the answer is hidden within the clue.
'GREW' is hidden within 'plug rewired'.
(Other definitions for grew that I've seen before include "Sprouted" , "Cultivated'" , "Got larger" , "Developed, matured" , "Multiplied" .)