Hispanic dish about to be introduced into Pacific island — cheer from Spain (9)
I believe the answer is:
guacamole
'hispanic dish' is the definition.
'guacamole' can be an answer for 'dish' (I've seen this before). I am unsure of the 'hispanic' bit.
'about to be introduced into pacific island cheer from spain' is the wordplay.
'about' becomes 'ca' (circa).
'to be introduced into' means one lot of letters goes inside another.
'pacific island' becomes 'guam' (I've seen this in another clue).
'cheer from spain' becomes 'ole' (Spanish exclamation meaning bravo!).
'ca' going into 'guam' is 'guacam'.
'guacam'+'ole'='GUACAMOLE'
Can you help me to learn more?
(Other definitions for guacamole that I've seen before include "Mexican dish" , "Avocado dip" , "tasty dip" , "Avocado-based dish" , "Mashed avocado dish" .)