Stresses about Omani MP changing sides? (14)

I believe the answer is:
accompaniments
'sides?' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'stresses about omani mp changing' is the wordplay.
'stresses' becomes 'accents' ('accent' can be a synonym of 'stress').
'about' is an insertion indicator.
'changing' indicates an anagram.
'omani'+'mp'='omanimp'
'omanimp' anagrammed gives 'ompanim'.
'accents' placed around 'ompanim' is 'ACCOMPANIMENTS'.
Can you help me to learn more?
I've seen this clue in The Times.
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