Twice a year kid meets old cameraman (9)
I believe the answer is:
paparazzo
'cameraman' is the definition.
'twice a year kid meets old' is the wordplay.
'twice' says to double the letters.
'a year' becomes 'pa' (per annum).
'kid' becomes 'razz' (both can mean to tease**).
'meets' says to put letters next to each other.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'pa' duplicated is 'papa'.
'papa'+'razz'+'o'='PAPARAZZO'
(Other definitions for paparazzo that I've seen before include "Celeb photographer" , "Spying photographer" .)