Upstart after a year runs meeting-place briefly (7)
I believe the answer is:
parvenu
'upstart' is the definition.
(I've seen this before)
'a year runs meeting-place briefly' is the wordplay.
'a year' becomes 'pa' (per annum).
'runs' becomes 'r' (cricket abbreviation).
'meeting-place' becomes 'venue' (I've seen this before).
'briefly' means to remove the last letter.
'venue' with its final letter taken away is 'venu'.
'pa'+'r'+'venu'='PARVENU'
'after' is the link.
(Other definitions for parvenu that I've seen before include "Social climber" , "Newcomer" , "An upstart, new arrival to society" , "Arriviste" , "Johnny-come-lately, upstart" .)