: a select well-informed inner circle that is influential in decision making <out of the policy loop>
[M-W's Col. Dic.]

What part of speech does select belong to in the context of the above definition? An adverb? If it is, then let me tell you that M-W's dictionary doesn't list select as an adverb.

Select is an adjective modifying inner circle.
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That means select and well-informed, both adjectives, are modifying noun inner circle. How many adjectives can be used to modify a single noun simultaneously at the most?
Only the rules of manageability and common sense contain the numbers, Jackson.