Consequence of baking regulation upset King visiting coastal region (9)
I believe the answer is:
shortcake
'region' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'consequence of baking regulation upset king visiting coastal' is the wordplay.
'consequence of baking regulation' becomes 'act' (I can't justify this - if you can you should give a lot more credence to this answer).
'upset' is a reversal indicator.
'king' becomes 'K' (abbreviation for king in chess).
'visiting' indicates putting letters inside.
'coastal' becomes 'shore' (similar in meaning).
'act' reversed gives 'tca'.
'tca'+'k'='tcak'
'tcak' inserted within 'shore' is 'SHORTCAKE'.
Can you help me to learn more?
(Other definitions for shortcake that I've seen before include "Rich type of biscuit" , "Sweet biscuit - rat chokes (anag)" , "it crumbles!" , "Rate shock (anag)" , "Dessert from America" .)