New comer is a bit lost at the average event space (7)
I believe the answer is:
parvenu
'new' is the definition.
(similar in meaning)
'comer is a bit lost at the average event space' is the wordplay.
I cannot quite see how this works, but
'a' is within the answer.
'space' could be 'en' (in printing, a space as wide as a letter 'n') and 'en' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for parvenu that I've seen before include "One who climbs" , "Social climber" , "Newly rich person" , "Johnny-come-lately, upstart" , "One coming" .)