2 words for HH 1–2 letters

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1 letter (1)

h
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2 letters (1)

hh
Hippy musical
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H
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A
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I
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Hint 1 meaning
A slender outgrowth from the chitinous cuticle of insects, spiders, crustaceans, and other invertebrates. Such hairs are totally unlike those of vertebrates in structure, composition, and mode of growth.
Hint 2 anagram
AIHR
Hint 3 another clue
Coat
13 +2