Heartthrob likes a lentil (5)
I believe the answer is:
pulse
This might be a double definition.
'heartthrob' is the first definition.
(thesaurus)
'lentil' is the second definition.
(thesaurus)
'likes a' is the link.
This may not be right. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for pulse that I've seen before include "Heartbeat; legume" , "Healthy food" , "A vital sign turning" , "Musical rhythm" , "Series of rhythmic beats" .)