Assorted elements of Lent are constant (7)

I believe the answer is:

eternal

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'constant' is the definition.
(I've seen this before)

'assorted elements of lent are' is the wordplay.
'lent are' can be anagrammed to 'ETERNAL'.
But, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for eternal that I've seen before include "'Lasting forever, unending (7)'" , "going on for ever" , "Not stopping" , "Timeless" , "Continuing forever or indefinitely" .)

I've seen this clue in The Daily Express.

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