Job precedes this, having first letters to be attended to with charity (6)
I believe the answer is:
psalms
'job precedes this having first letters to' is the definition.
The definition suggests a singular noun but the answer is a plural noun.
'attended to with charity' is the wordplay.
'attended to' becomes 'ps' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' is a charade indicator (letters next to each other).
'charity' becomes 'alms' (alms is a kind of charity).
'ps'+'alms'='PSALMS'
'be' acts as a link.
Can you help me to learn more?
(Other definitions for psalms that I've seen before include "OT book" , "Old Testament book of sacred songs" , "Religious songs" , "Biblical songs" , "They're heard in church" .)