Labels with small hearts on them? (8)
I believe the answer is:
stickers
'labels' is the definition.
('sticker' can be a synonym of 'label')
'hearts on them?' is the wordplay.
'hearts' becomes 'tickers' ('ticker' can be a synonym of 'heart').
'on' says to put letters next to each other.
'them?' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'tickers' put after 's' is 'STICKERS'.
'with small' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for stickers that I've seen before include "Maybe notices" , "Adhesive labels" .)