Fervent manner of expression (7)

I believe the answer is:

unction

(Other definitions for unction that I've seen before include "Excessive politeness" , "An anointing; oily charm" , "Insincere charm - anointing" , "Extreme sacrament for the dying" , "Act of anointing someone as part of a rite" .)

I've seen this clue in The Sun.

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