Send her my poem (5)
I believe the answer is:
rhyme
'poem' is the definition.
(I know that rhyme is a type of poem)
'send her my' is the wordplay.
'send' is an anagram indicator (I've seen 'sends' mean this (send can mean excite or stir)).
'her'+'my'='hermy'
'hermy' with letters rearranged gives 'RHYME'.
(Other definitions for rhyme that I've seen before include "Verse, doggerel" , "Short poem" , "Box and cox, for example" , "Have the same final sound - poetry" , "Have identical terminal sounds" .)