Show changing time on map (9)
I believe the answer is:
pantomime
'show' is the definition.
(I've seen this before)
'changing time on map' is the wordplay.
'changing' indicates anagramming the letters.
'time'+'on'+'map'='timeonmap'
'timeonmap' anagrammed gives 'PANTOMIME'.
(Other definitions for pantomime that I've seen before include "Mime on tap in children's show" , "'Cinderella', for example" , "eg 'Mother Goose'" , "Play performed at Christmas" , "Christmas theatre, usually with Dame" .)