One of a pack taking a trot (5)

I believe the answer is:

tarot

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'one of a pack' is the definition.
'tarot' can be an answer for 'pack' (type of card pack). I am not sure about the 'one of a' bit.

'taking a trot' is the wordplay.
'taking' means one lot of letters goes inside another.
'a' put into 'trot' is 'TAROT'.

Can you help me to learn more?

(Other definitions for tarot that I've seen before include "Fortune-teller's card" , "Mystic cards" , "Card used for fortunetelling" , "78-card pack" , "fortune-teller?" .)

I've seen this clue in the Evening Standard.

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