Flipping great, the Queen's cooking instructions (6)
I believe the answer is:
recipe
'cooking instructions' is the definition.
(I've seen this before)
'flipping great the queen's' is the wordplay.
'flipping' shows that the letters should be reversed in order.
'great' becomes 'epic'.
'the queen' becomes 'er' (Elizabeth Regina).
'epic'+'er'='epicer'
'epicer' backwards is 'RECIPE'.
(Other definitions for recipe that I've seen before include "Food method" , "Step by step method" , "Directions for cooking the turkey e.g." , "Instruction for cooking" , "Directions for making food etc" .)