Spooner's second newlywed produce platitudes (8)
I believe the answer is:
bromides
'platitudes' is the definition.
('bromide' can be a synonym of 'platitude')
'spooner's second newlywed' is the wordplay.
I cannot really understand how this works, but
'second' could be 's' (common abbreviation) and 's' is located in the answer.
The remaining letters 'bromide' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'produce' acts as a link.
Can you help me to learn more?
(Another definition for bromides that I've seen is " boring types".)