Endless enthusiasm taxi drivers put into various items (4-1-4)

I believe the answer is:

bric-a-brac

(Other definitions for bric-a-brac that I've seen before include "Knick-knacks" , "Motley collection" , "Odd items of furniture, ornaments etc" , "Miscellaneous objects of little value" , "Miscellaneous small objects, especially curios" .)

I've seen this clue in The Guardian.

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