Bit of a spectacular appearance (6)
I believe the answer is:
aspect
'appearance' is the definition.
(aspect is a kind of appearance)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for aspect that I've seen before include "Viewpoint or view" , "Particular part or feature of something" , "Standpoint" , "Particular or distinct element, of a problem say" , "Distinct part or element" .)