Crossword Genius

Plans to send back this unwanted message (4)

Ross

I believe the answer is:

spam

'unwanted message' is the definition.
(unwanted email)

'plans to send back' is the wordplay.
'plans' becomes 'maps' (I've seen this in another clue).
'to send back' is a reversal indicator (I've seen 'sends back' mean this).
'maps' written backwards gives 'SPAM'.

'this' is the link.

(Other definitions for spam that I've seen before include "canned meat" , "Tinned processed meat" , "unwanted correspondence" , "luncheon meat" , "Uninvited email" .)

I've seen this clue in The Times.
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