Deliver sermon: quick to dismiss God, capturing Church uncertainty (9)
I believe the answer is:
speechify
'deliver' is the definition.
(synonyms)
'sermon quick to dismiss god capturing church uncertainty' is the wordplay.
I cannot really see how this works, but
'church' could be 'ch' (abbreviation on maps etc) and 'ch' is found in the answer.
'uncertainty' could be 'if' (if can mean a condition or uncertainty) and 'if' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for speechify that I've seen is " Talk at length".)