Holy text saint held in part of hand (5)
I believe the answer is:
psalm
'holy text' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'saint held in part of hand' is the wordplay.
'saint' becomes 's'.
'held in' indicates putting letters inside.
'part of hand' becomes 'palm' ('palm' is part of 'hand').
's' going inside 'palm' is 'PSALM'.
Can you help me to learn more?
(Other definitions for psalm that I've seen before include "Sacred song or hymn" , "Religious chant" , "Devotional hymn or song" , "Palms (anag.)" , "OT hymn" .)