One many-tongued, fantastic unicorn’s skin is gilt (8)

I believe the answer is:

linguist

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'one many-tongued' is the definition.
I can't tell whether this definition defines the answer.

'fantastic unicorn's skin is gilt' is the wordplay.
'fantastic' is an anagram indicator.
'skin' means to remove the middle letters.
'unicorn' with its middle taken out is 'un'.
'un'+'is'+'gilt'='unisgilt'
'unisgilt' is an anagram of 'LINGUIST'.

Can you help me to learn more?

(Other definitions for linguist that I've seen before include "He speaks in tongues" , "is speaking in tongues" , "One proficient in languages" , "Language expert" , "Person proficient in languages" .)

I've seen this clue in The Hindu.

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