Ticket sellers start talking to us agitatedly (5)
I believe the answer is:
touts
'ticket sellers' is the definition.
(as in ticket touts)
'start talking to us agitatedly' is the wordplay.
'start' indicates taking the first letters.
'agitatedly' indicates anagramming the letters (I've seen this in other clues).
The initial letter of 'talking' is 't'.
'to'+'us'='tous'
'tous' is an anagram of 'outs'.
't'+'outs'='TOUTS'
(Other definitions for touts that I've seen before include "Sellers of tickets at inflated prices" , "Ticket hucksters" , "(Ticket) sellers" .)