Kiss repeatedly, being equal (4,3,4)
I believe the answer is:
neck and neck
'equal' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'kiss repeatedly' is the wordplay.
'kiss repeatedly' can mean three substitutions for 'kiss'.
'kiss' becomes 'neck' (neck can informally mean to kiss).
'kiss' becomes 'and' (I can't justify this - if you can you should give a lot more credence to this answer).
'kiss' becomes 'neck' (neck can informally mean to kiss).
'neck'+'and'+'neck'='NECK-AND-NECK'
'being' acts as a link.
Can you help me to learn more?
(Other definitions for neck and neck that I've seen before include "Absolutely level (in race)" , "New lovers frequently do it" , "keep on canoodling" , "Bill and coo" , "What might lovers do repeatedly" .)