Holy person wants to talk about a certain singer (9)
I believe the answer is:
stonechat
'singer' is the definition.
(stonechat is a kind of birdanimal)
'holy person wants to talk about a certain' is the wordplay.
'holy person' becomes 'st' (I've seen this in other clues).
'wants' says to put letters next to each other.
'to talk' becomes 'chat' (I've seen this before**).
'about' says to put letters next to each other.
'a certain' becomes 'one' (I've seen this before).
'chat' put after 'one' is 'onechat'.
'st'+'onechat' is 'STONECHAT'.
(Other definitions for stonechat that I've seen before include "Bird of thrush family" , "Heathland songbird" , "Small heathland bird" , "singer" .)