Cuts in central Greece producing blackout (7)
I believe the answer is:
eclipse
'blackout' is the definition.
(I've seen this before)
'cuts in central greece' is the wordplay.
'cuts' becomes 'clips' (clipping is a kind of cutting).
'in' means one lot of letters goes inside another.
'central' indicates the central letters.
The centre of 'greece' is 'ee'.
'clips' inserted within 'ee' is 'ECLIPSE'.
'producing' is the link.
(Other definitions for eclipse that I've seen before include "Outdo" , "Overshadow, obscure" , "Ennui" , "Obscurement of one heavenly body by another" , "When light's dropped" .)