The most common and most likely answer to this crossword clue is the 4 plus 2 letter word CALL IN
I've seen this crossword clue in The Guardian
C
A
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More clues leading to the result CALL IN
Buddy explains!
The straight part
We know that "Visit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case visit = call in.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.
Crossword Answer definitions
CALL IN noun- A TV or radio programme allowing members of the public to telephone the studio and talk live to the presenter.
- A telephone call of this kind.
- A caller who makes such a call.
- (of a TV or radio programme) In which members of the public telephone the studio and talk live to the presenter.