A satellite receiver outside, wicked inside: diabolical (8)
I believe the answer is:
devilish
'diabolical' is the definition.
(I know that diabolical can be written as devilish)
'a satellite receiver outside wicked' is the wordplay.
'a satellite receiver' becomes 'dish' (satellite dish).
'outside' means one lot of letters goes inside another.
'wicked' becomes 'evil' (associated in meaning).
'dish' going around 'evil' is 'DEVILISH'.
'inside' acts as a link.
(Other definitions for devilish that I've seen before include "Very wicked" , "naughty" , "Mischievous; rakish" , "Very difficult to deal with" , "Diabolical" .)