Intros (7)
I believe the answer is:
openers
'intros' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for openers that I've seen before include "overtures?" , "Two bats" , "Batsmen going in first" , "Batsmen Nos 1 and 2" , "in demand at picnics" .)