The most common and most likely answer to this crossword clue is the 4 letter word SEES
I've seen this crossword clue in The Guardian
S
E
E
S
More clues leading to the result SEES
Buddy explains!

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 SEES mean?
SEES verb- (stative) To perceive or detect with the eyes, or as if by sight.
- To form a mental picture of.
- (social) To meet, to visit.
- To be the setting or time of.
- (by extension) To ensure that something happens, especially while witnessing it.
- To wait upon; attend, escort.
- To respond to another player's bet with a bet of equal value.
- To determine by trial or experiment; to find out (if or whether).
- (used in the imperative) To reference or to study for further details.
- To examine something closely, or to utilize something, often as a temporary alternative.
- To include as one of something's experiences.
- A diocese, archdiocese; a region of a church, generally headed by a bishop, especially an archbishop.
- The office of a bishop or archbishop; bishopric or archbishopric
- A seat; a site; a place where sovereign power is exercised.