Snack perhaps in hacienda, large inside (9)
I believe the answer is:
enchilada
'snack' is the definition.
(I have seen 'spicy snack' mean 'enchilada' so perhaps 'snack' could also mean 'enchilada')
'in hacienda large inside' is the wordplay.
I cannot really understand how this works, but
'large' could be 'l' (eg in clothes sizes) and 'l' is located in the answer.
an anagram of 'hacienda' is 'enchiada' which is present in the left over letters.
This accounts for all the letters.
This explanation may well be incorrect...
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for enchilada that I've seen before include "Rolled stuffed tortilla with chilli sauce" , "Mexican dish" , "Filled tortilla served with chilli sauce" , "spicy food" , "Tortilla with meat and chilli" .)