Sacred song -- short sample stirred (5)
I believe the answer is:
psalm
'sacred song' is the definition.
(I've seen this before)
'short sample stirred' is the wordplay.
'short' means to remove the last letter.
'stirred' indicates anagramming the letters.
'sample' with its last letter removed is 'sampl'.
'sampl' anagrammed gives 'PSALM'.
(Other definitions for psalm that I've seen before include "Devotional hymn or song" , "A song which praises" , "Religious chant" , "Sacred poem attributed to David" , "Sacred song of praise" .)