Merry monarch's order for salad? (8)
I believe the answer is:
coleslaw
'salad?' is the definition.
(coleslaw is a kind of salad)
'merry monarch's order' is the wordplay.
'merry monarch' becomes 'cole' (reference to the nursery rhyme Old King Cole).
'order' becomes 'slaw' (I can't justify this - if you can you should give a lot more credence to this answer).
'cole'+'slaw'='COLESLAW'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for coleslaw that I've seen before include "Dish of shredded cabbage and carrot" , "Salad dish of shredded cabbage, etc" , "Salad of shredded vegetables" , "Salad dish of dressed shredded cabbage" , "Finely shredded raw cabbage with carrots and dressing as salad" .)