Immature timber from which palings may be made (7)

I believe the answer is:

sapling

I'm a little stuck... Click here to teach me more about this clue!

'immature timber' is the definition.
'sapling' can be an answer for 'timber' (thesaurus). I'm not sure about the 'immature' bit.

'which palings may be made' is the wordplay.
'palings' anagrams to 'SAPLING'.
But, I am unsure how the anagram is indicated.

'from' acts as a link.

Can you help me to learn more?

(Other definitions for sapling that I've seen before include "Baby tree" , "small bit of wood" , "Young slender tree" , "Poetic youth" , "Little tree" .)

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

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