No odd number in service (8)

I believe the answer is:

evensong

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'service' is the definition.
(type of church service)

'no odd number' is the wordplay.
'no odd' becomes 'even' (I can't justify this - if you can you should give a lot more credence to this answer).
'number' becomes 'song' (musical number).
'even'+'song'='EVENSONG'

'in' is the link.

Can you help me to learn more?

(Other definitions for evensong that I've seen before include "6 [SERVICE] ?" , "Late afternoon church service" , "... Prayers" , "Anglican service" , "Vespers" .)

I've seen this clue in The Sun.

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