I love bananas, hot in the middle, with the Italian dressing (5,3)
I believe the answer is:
olive oil
'dressing' is the definition.
(I've seen this before)
'i love bananas hot in the middle with the italian' is the wordplay.
'bananas' indicates an anagram (bananas can informally mean crazy).
'in the middle' means to look at the middle letters.
'with' means one lot of letters go next to another.
'the italian' becomes 'il' ('the' in Italian).
The centre of 'hot' is 'o'.
'i'+'love'='ilove'
'ilove' is an anagram of 'olive'.
'olive'+'o'+'il'='OLIVE-OIL'
(Other definitions for olive oil that I've seen before include "Culinary liquid" , "Common Mediterranean cooking ingredient" , "What may be extra virgin" , "Pressed cooking ingredient" , "Ingredient of salad dressing" .)