Here are the possible solutions for improved as one's skill level clue
Answer
Clue
Relevancy
elevated
Clue
Improved, as one's skill level
Definition
a raised railway
honed
Clue
Improved, as a skill
Definition
HONE, to whet
dan
Clue
Karate skill level
Definition
(Japanese) a level of efficiency in Japanese combative sports
easy
Clue
Skill level option
Definition
not difficult
elo
Clue
___ rating (chess skill-level measure)
ozone
Clue
Low-level pollution or high-level protection
Definition
an allotropic form of oxygen present in the atmosphere
ptomaineconcourse
Clue
Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig
