Send unsolicited mail and tinned meat (4)
I believe the answer is:
spam
This clue is a double definition.
'send unsolicited mail' is the first definition.
(I've seen this before)
'tinned meat' is the second definition.
(tinned meat product)
'and' acts as a link.
(Other definitions for spam that I've seen before include "Possible item from menu" , "unwanted delivery" , "Send unsolicited mail" , "Unwanted e-mails" , "unsolicited communication" .)