A little secretive about choice of openers for Headingley Test (7)
I believe the answer is:
shortly
'choice of openers for headingley test' is the definition.
I can't judge whether this definition defines the answer.
'a little secretive about' is the wordplay.
'a little' becomes 'hort' (I can't explain this - if you can you should give a lot more credence to this answer).
'secretive' becomes 'sly' (I've seen this in other clues).
'about' is an insertion indicator.
'hort' inserted inside 'sly' is 'SHORTLY'.
Can you help me to learn more?
(Other definitions for shortly that I've seen before include "In a jiffy" , "Soon: in an abbreviated manner" , "Soon; sharply" .)