Note it’s a palindrome (5)
I believe the answer is:
minim
This clue is a double definition.
'note' is the first definition.
(minim is a kind of note)
'a palindrome' is the second definition.
'it's' is the link.
(Other definitions for minim that I've seen before include "note or > dose" , "Feature of a score" , "Note with value of half a semibreve" , "Double crotchet" , "Half-note" .)