Excuse me for awful pig odour nearby (1,3,4,6)

I believe the answer is:

i beg your pardon

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'excuse me for awful pig odour nearby' is the definition.
I can't judge whether this defines the answer.

'awful pig odour nearby' is the wordplay.
'awful' indicates anagramming the letters.
'pig'+'odour'+'nearby'='pigodournearby'
'pigodournearby' is an anagram of 'I BEG YOUR PARDON?'.

Can you help me to learn more?

(Other definitions for i beg your pardon that I've seen before include "Please forgive me" , "Sorry" , "come again" , "let me off, please" .)

I've seen this clue in the Sydney Morning Herald.

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