Meat plans rejected (4)
I believe the answer is:
spam
'meat' is the definition.
(Spam is an example)
'plans rejected' is the wordplay.
'plans' becomes 'maps' (I've seen this before).
'rejected' is a reversal indicator.
'maps' in reverse letter order is 'SPAM'.
(Other definitions for spam that I've seen before include "Unwanted communication" , "Spiced ham" , "Thoughtlessly send" , "Possible item from menu" , "unwanted correspondence" .)