Hearts enthralled by kind Lilliputian (5)
I believe the answer is:
short
'lilliputian' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'hearts enthralled by kind' is the wordplay.
'hearts' becomes 'h' (abbreviation used in card games e.g. bridge).
'enthralled by' indicates putting letters inside ('enthral' can mean 'capture').
'kind' becomes 'sort' (synonyms).
'h' placed inside 'sort' is 'SHORT'.
Can you help me to learn more?
(Other definitions for short that I've seen before include "Curt" , "Neat" , "Small in height" , "Concise" , "Having little length" .)