Writer constrained by constant urge? Never! (8)

I believe the answer is:

turgenev

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

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

'constrained by constant urge? never' is the wordplay.
'TURGENEV' is hidden within the letters.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for turgenev that I've seen before include "Ivan -, Russian novelist (Fathers and Sons)" , "Russian author (Fathers and Sons, Virgin Soil)" , "Ivan -------- (1818-1883), writer about Russian life as in Fathers and Sons" , "Ivan -, Russian author (A Month in the Country)" , "River at Stratford" .)

I've seen this clue in The Times.

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