Secure advanced warning and protective cover (8)

I believe the answer is:
pinafore
'protective cover' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'secure advanced warning' is the wordplay.
'secure' becomes 'pin' (pinning is a kind of securing).
'advanced' becomes 'a' (abbreviation).
'warning' becomes 'fore' (shouted in golf).
'pin'+'a'+'fore'='PINAFORE'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for pinafore that I've seen before include "Sleeveless dress or apron" , "Musical craft" , "It protects female worker" , "Sleeveless apron-like dress" , "Protective gear" .)
