Time slot if out of recurrent themes (10)

I believe the answer is:

leitmotifs

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'recurrent themes' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe there's a link between them I don't understand?

'time slot if out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'time'+'slot'+'if'='timeslotif'
'timeslotif' anagrammed gives 'LEITMOTIFS'.

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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