Type of thermometer I inserted for show (7)

I believe the answer is:

recital

I'm a little stuck... Click here to teach me more about this clue!

'for show' is the definition.
(recital is a kind of show)

I can't explain the remainder of the clue.

(Other definitions for recital that I've seen before include "Public performance by a solo musician" , "Public performance of music" , "Concert by soloist" , "Article (anag)" , "Telling" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app