Love to tuck into desserts such as honey bun and treacle (5,8)
I believe the answer is:
sweet nothings
'as honey bun and treacle' is the definition.
I can't tell whether this defines the answer.
'love to tuck into desserts' is the wordplay.
'love' becomes 'nothing' (love means zero in tennis).
'to tuck into' indicates putting letters inside.
'desserts' becomes 'sweets' ('sweet' can be a synonym of 'dessert').
'nothing' put within 'sweets' is 'SWEET NOTHINGS'.
'such' acts as a link.
Can you help me to learn more?
(Other definitions for sweet nothings that I've seen before include "words of love" , "I would love to say these" , "Loving words" , "Lovers' words?" , "whispered words of affection" .)