Meet Carol, disorganised person who keeps you waiting? (9)
I believe the answer is:
latecomer
'person who keeps you waiting?' is the definition.
'latecomer' can be an answer for 'person' (latecomer is a kind of person). I'm unsure of the remainder of the definition.
'meet carol disorganised' is the wordplay.
'disorganised' indicates an anagram.
'meet'+'carol'='meetcarol'
'meetcarol' with letters rearranged gives 'LATECOMER'.
Can you help me to learn more?
(Other definitions for latecomer that I've seen before include "One arriving after time" , "Recent convert" , "Delayed arrival" , "one's a poor timekeeper" , "One who arrives tardily, not punctually" .)