Chilled portion of ham you left by top of fridge (8)
I believe the answer is:
peaceful
'chilled portion' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs occasionally mean the same thing.
'of ham you left by top of fridge' is the wordplay.
'of ham' becomes 'peace' (I am not sure about this - if you are sure you should believe this answer much more).
'you' becomes 'u' (homophones).
'left' becomes 'l' (common abbreviation).
'by' is a charade indicator (letters next to each other).
'top of' suggests taking the first letters.
The initial letter of 'fridge' is 'f'.
'u'+'l'='ul'
'ul' after 'f' is 'ful'.
'peace'+'ful'='PEACEFUL'
Can you help me to learn more?
(Other definitions for peaceful that I've seen before include "Calm and undisturbed by strife" , "Quiet" , "Tranquil, calm" , "Not violent" , "Not disturbed by strife or war" .)