The most common and most likely answer to this crossword clue is the 4 letter word JOHN
J
O
H
N
More clues leading to the result JOHN
- Book an office
- Little the outlaw does for his royal enemy
- & 3 Loo cover lifted, sit awhile: which 9 preceded 23 1?
- Jack of hearts never leads flush here
- Perhaps, Sergeant Major, perhaps
- Can vacuous jargon enthral? That’s a surprise!
- Boy heads?
- Looking?
- Where to go for a trick
- E.g. Keats, Milton, or Pope, often
Buddy explains!

The straight part
We know that "Can" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case can = john.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 JOHN mean?
JOHN noun- A prostitute's client.
- A device or place to urinate and defecate: now usually a toilet or lavatory, but also a chamber pot or outhouse.
- A Western man traveling in East Asia.
- A male mule.