Like a grade of B+, say

GOOD

["Think of a common word that positively describes something when it meets expectations."]

The clue "Like a grade of B+, say" leads to the answer "GOOD" through a simple analogy. In academic grading systems, a B+ is generally considered a good grade. The clue is asking for a word that describes something positive or satisfactory, similar to how a B+ is a good grade. Therefore, the answer is "GOOD." There's no complex wordplay or puns involved; it's a straightforward comparison.