Cheesy dish cooked just a little moment (7)
I believe the answer is:
rarebit
'cheesy dish' is the definition.
(I've seen this in another clue)
'cooked just a little moment' is the wordplay.
'cooked just' becomes 'r' (I can't justify this - if you can you should give a lot more credence to this answer).
'a' becomes 'area' (maths abbreviation).
'little' means to remove the last letter (the word is not quite complete).
'moment' becomes 'bit' (synonyms).
'area' with its last letter removed is 'are'.
'r'+'are'+'bit'='RAREBIT'
Can you help me to learn more?
(Other definitions for rarebit that I've seen before include "Arbiter of tasty Welsh dish of cheese on toast" , "Cheesy snack" , "Simple dish" , "on Welsh table?" , "Arbiter of traditional Welsh dish" .)