Pastry one very good, coarse and large (7)
I believe the answer is:
strudel
'pastry' is the definition.
(I know this)
'one very good coarse and large' is the wordplay.
'one very good' becomes 'st' (I can't explain this - if you can you should believe this answer much more).
'coarse' becomes 'rude' (I've seen this in another clue).
'and' means one lot of letters go next to another.
'large' becomes 'L' (eg in clothes sizes).
'st'+'rude'+'l'='STRUDEL'
Can you help me to learn more?
(Other definitions for strudel that I've seen before include "German pastry dish" , "See 6" , "Rolled pastry dessert" , "German dessert" , "Dessert of thin pastry filled with fruit" .)