Not saying much about old Yorkshireman in the van (3)
I believe the answer is:
coy
'old yorkshireman in the van' is the definition.
I can't tell whether this definition defines the answer.
'not saying much about' is the wordplay.
'not' becomes 'o' (I've seen this in other clues).
'saying much' becomes 'cy' (I can't explain this - if you can you should believe this answer much more).
'about' indicates putting letters inside.
'o' placed within 'cy' is 'COY'.
Can you help me to learn more?
(Other definitions for coy that I've seen before include "Reserved" , "Pretending modesty" , "Military team in brief" , "Group of soldiers" , "reluctant to divulge information" .)