Its a long walk from the theatre, kids! (4)

I believe the answer is:

trek

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'its a long walk' is the definition.
I can't judge whether this definition defines the answer.

'from the theatre kids' is the wordplay.
'from' indicates the answer is hidden within the clue.
'TREK' can be found hidden inside 'theatre kids'.

Can you help me to learn more?

(Other definitions for trek that I've seen before include "Long walk, expedition" , "A long arduous walk" , "Expedition or difficult trip" , "Long walk in the mountains?" , "Great journey" .)

I've seen this clue in The Irish Independent.

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