A song from little Sarah in the afternoon (5)
I believe the answer is:
psalm
'a song' is the definition.
(I've seen this before)
'little sarah in the afternoon' is the wordplay.
'little' means to remove the last letter (the word is not quite complete).
'sarah' becomes 'Sall' (Sally is a common pet form of Sarah).
'in' is an insertion indicator.
'the afternoon' becomes 'pm'.
'sall' with its final letter taken away is 'sal'.
'sal' inserted within 'pm' is 'PSALM'.
'from' is the link.
(Other definitions for psalm that I've seen before include "Religious chant" , "Jewish hymn" , "Lamps for a sacred song" , "Church hymn" , "Palms (anag.)" .)