Virtually junk food? (4)
I believe the answer is:
spam
This clue might be a double definition.
'virtually junk' is the first definition.
'spam' can be an answer for 'junk' (I've seen this before). I'm not sure about the 'virtually' bit.
'food?' is the second definition.
(I know that Spam is a type of cold cut)
Can you help me to learn more?
(Other definitions for spam that I've seen before include "net on junk? On the contrary" , "unwanted delivery" , "Junk email" , "unsolicited communication" , "Computer junk mail" .)