Keen kiosk gets rid of last sparkler (7)

I believe the answer is:
crystal
'sparkler' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'keen kiosk gets rid of last' is the wordplay.
'keen' becomes 'crysta' (I am not sure about this - if you are sure you should believe this answer much more).
'kiosk' becomes 'stall' (synonyms).
'gets rid of' is a deletion indicator.
'stall' with 'last' taken away is 'l'.
'crysta'+'l'='CRYSTAL'
Can you help me to learn more?
(Other definitions for crystal that I've seen before include "The fortune teller may use a . . . . . . . ball" , "Clear material such as quartz" , "Quality glass" , "Glassware" , "Very clear glass" .)
