The most common and most likely answer to this crossword clue is the 7 letter word OBSERVE
I've seen this crossword clue in The Guardian
O
B
S
E
R
V
E
More clues leading to the result OBSERVE
- Watch ever so unreliable, black inside
- Keep watch
- Piece of work judge overlooked — do pay attention
- Watch old boy wait
- Comply with note to watch clock
- Regularly lobby minister to make a comment
- Watch old boy start game in court
- Notice work not starting to be of use
- Note stink over ball delivery
- Watch Bobby regularly hit the ball
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 OBSERVE mean?
OBSERVE verb- To notice or view, especially carefully or with attention to detail.
- To follow or obey the custom, practice, or rules (especially of a religion).
- To take note of and celebrate (a holiday or similar occurrence).
- To comment on something; to make an observation.