The most common and most likely answer to this crossword clue is the 4 letter word SPAM
S
P
A
M
More clues leading to the result SPAM
- Junk plans to head west
- Circulate plans for junk mail
- Plans returning this unwanted correspondence
- On way back, plans to get something to eat
- Rejection of plans for annoying emails
- Plans drawn up to provide tinned food
- Returned plans for tinned meat
- Chances morning will bring unwanted correspondence
- Circulated plans for junk mail
- Unwelcome messages – 14, 20 produces the reverse of that
Buddy explains!

The straight part
We know that "unwanted correspondence" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case unwanted correspondence = spam.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SPAM mean?
SPAM noun- (rarely countable) Unsolicited bulk electronic messages.
- Any undesired electronic content automatically generated for commercial purposes.
- A type of tinned meat made mainly from ham.
- To send spam (i.e. unsolicited electronic messages.)
- To send spam (i.e. unsolicited electronic messages) to a person or entity.
- (by extension) To use (a spell or ability) rapidly and repeatedly.
- To post the same text repeatedly with disruptive effect; to flood.