Clothes billowed unfortunately revealing vital components (5,5,5)

I believe the answer is:

white blood cells

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'vital components' is the definition.
Although both the answer and definition are plural nouns, I cannot see how one could define the other.

'clothes billowed unfortunately' is the wordplay.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'clothes'+'billowed'='clothesbillowed'
'clothesbillowed' with letters rearranged gives 'WHITE BLOOD CELLS'.

'revealing' is the link.

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