Spooky girl sides with MC in front of yobs (7)
I believe the answer is:
ghostly
'spooky' is the definition.
(thesaurus)
'girl sides with mc in front of yobs' is the wordplay.
'sides' says to hollow out the word (remove centre letters) (only the letters on the sides are used).
'with' is an insertion indicator.
'mc' becomes 'host' (an MC is a host or presenter).
'in front of' suggests taking the first letters.
'girl' with its middle removed is 'gl'.
The first letter of 'yobs' is 'y'.
'gl' enclosing 'host' is 'ghostl'.
'ghostl'+'y'='GHOSTLY'
(Other definitions for ghostly that I've seen before include "Eerie, unnatural" , "Phantom-like, spectral" , "Phantasmal" , "Spectral, like Marley" .)