The price of a trip? (7)

I believe the answer is:

penalty

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'the price' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

(Other definitions for penalty that I've seen before include "Punishment for error (in game)" , "kick by footballer" , "Perhaps fine" , "Spot kick" , "Fine - handicap" .)

I've seen this clue in the Evening Standard.

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