The most common and most likely answer to this crossword clue is the 7 letter word INCISOR
I've seen this crossword clue in The Guardian
I
N
C
I
S
O
R
More clues leading to the result INCISOR
- Chunk of zinc is originally for cutter
- In mouth of count is gold tooth
- Lead part in biting, ironic plays about society
- Tooth in front of canine is yellow
- In mouth of convict is gold tooth
- Lead-free metal is on gold tooth
- Tooth seen in bionic bits you’re oddly ignoring
- Fake coins found in Ireland — one’s coated in enamel
- Is nothing right in the wake of elected Conservative?
- Cutting edge dental equipment
Buddy explains!

The straight part
We know that "one’s coated in enamel" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one’s coated in enamel = incisor.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 INCISOR mean?
INCISOR noun- One of the front teeth of mammals, between the canines.