Unusual focaccia pie initially needs a lot of water (7,5)
I believe the answer is:
pacific ocean
'water' is the definition.
(I know that Pacific Ocean is a ocean)
'unusual focaccia pie initially needs' is the wordplay.
'unusual' indicates an anagram.
'initially' says to take the initial letters.
The initial letter of 'needs' is 'n'.
'focaccia'+'pie'='focacciapie'
'focacciapie' anagrammed gives 'pacificocea'.
'pacificocea'+'n'='PACIFIC OCEAN'
'a lot of' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for pacific ocean that I've seen before include "World''s largest, deepest sea" , "Sea of Tranquillity?" , "Largest sea on Earth" , "Main discovery made by European" .)