Welsh dish provided in bloody small portion (7)
I believe the answer is:
rarebit
'welsh dish' is the definition.
(I've seen this in another clue)
'bloody small portion' is the wordplay.
'bloody' becomes 'rare' (I've seen this in another clue).
'small portion' becomes 'bit' (I've seen this in another clue).
'rare'+'bit'='RAREBIT'
'provided in' is the link.
(Other definitions for rarebit that I've seen before include "which the Welsh take down?" , "See 8 Across" , "Arbiter of tasty Welsh dish of cheese on toast" , "Arbiter (anag) -- snack" , "Cheese on toast - arbiter (anag)" .)