A little nonsense to hearten one's betrothed? (3)

I believe the answer is:

rot

I'm a little stuck... Click here to teach me more about this clue!

'a little nonsense' is the definition.
'rot' can be an answer for 'nonsense' (rot can mean nonsense or rubbish). I'm not certain of the 'a little' bit.

'hearten one's betrothed?' is the wordplay.
'ROT' is hidden in amongst the letters.
However, I am unsure how this is indicated.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for rot that I've seen before include "Decomposition" , "Paradise" , "SECOND PART OF 25" , "Balderdash" , "Decay, go bad" .)

I've seen this clue in the Evening Standard.

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