A Celt is unusually ready to give! (7)

I believe the answer is:

elastic

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'ready to give' is the definition.
I can't judge whether this defines the answer.

'a celt is unusually' is the wordplay.
'unusually' indicates anagramming the letters.
'a'+'celt'+'is'='aceltis'
'aceltis' is an anagram of 'ELASTIC'.

Can you help me to learn more?

(Other definitions for elastic that I've seen before include "Tape containing flexible rubber" , "Scale it (anag.)" , "Material that stretches" , "Stretching tape" , "Resilient" .)

I've seen this clue in The Globe and Mail.

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