The most common and most likely answer to this crossword clue is the 5 letter word CIGAR
I've seen this crossword clue in Independent
C
I
G
A
R
More clues leading to the result CIGAR
- I start to gasp, overcome by vehicle's smoke
- Cold fish, one potted, one smoked
- Westbound kid I see leaves having been wrapped up?
- Smoke starts to creep into half of garden
- Smoke in garage starts to fill vehicle
- Sharp fragments with eg acid in the form of smoke
- US soldier climbing in automobile finds smoke
- 26 down, say, holding Joe up in Havana?
- One’s rolled up with soldier upset in vehicle
- Smoke from motor keeps inching around the edges
Buddy explains!

The straight part
We know that "E.g. Hamlet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case e.g. hamlet = cigar.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 CIGAR mean?
CIGAR noun- Tobacco rolled and wrapped with an outer covering of tobacco leaves, intended to be smoked.
- Penis