March often features this fast start (3,9)

I believe the answer is:

ash wednesday

I believe this clue is a double definition.

'march often features this' is the first definition.
(Ash Wednesday often happens in March)

'fast start' is the second definition.
(beginning of Lent)

(Other definitions for ash wednesday that I've seen before include "Time to start doing without" , "Date in church calendar" , "fast start" , "Beginning of Lent" , "Start of Lent" .)

I've seen this clue in The Guardian.

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