Psalm a bit absurd at christening (9)

I believe the answer is:

baptismal

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'psalm a bit absurd at christening' is the definition.
I can't judge whether this definition defines the answer.

'psalm a bit absurd' is the wordplay.
'absurd' indicates an anagram.
'psalm'+'a'+'bit'='psalmabit'
'psalmabit' anagrammed gives 'BAPTISMAL'.

Can you help me to learn more?

(Other definitions for baptismal that I've seen before include "church service" , "Relating to the rite of admission to the Christian Church" .)

I've seen this clue in The Times and The Sunday Times.

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