A tropical American click beetle of the genus Pyrophorus with luminescent thoracic organs (7)

I believe the answer is:

firefly

(Other definitions for firefly that I've seen before include "One shining" , "crawler" , "Beetle which glows in the dark" , "Light horse-drawn carriage" , "Winged beetle - racing dinghy" .)

I've seen this clue in The Independent.

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