Scored opening runs into covers (5)
I believe the answer is:
intro
'scored opening runs into covers' is the definition.
I can't judge whether this defines the answer.
'opening runs into covers' is the wordplay.
'opening' suggests taking the first letters.
'covers' means one lot of letters goes inside another.
The first letter of 'runs' is 'r'.
'r' placed into 'into' is 'INTRO'.
Can you help me to learn more?
(Other definitions for intro that I've seen before include "Prologue, opening (abbr.)" , "Preamble" , "starter" , "Nitro (anag.)" , "Song's opening" .)