Rector’s first boy brought in some bells for his own use? (8)
I believe the answer is:
personal
'for his own use?' is the definition.
(for personal use)
'rector's first boy brought in some bells' is the wordplay.
'rector's first' becomes 'r' (1st letter of 'rector').
'boy' becomes 'son' (synonyms).
'brought in' indicates putting letters inside.
'some bells' becomes 'peal' (peal means a ringing of bells).
'r'+'son'='rson'
'rson' going into 'peal' is 'PERSONAL'.
(Other definitions for personal that I've seen before include "Affecting an individual" , "Offensively intrusive" , "Of one individual" , "Wounding" , "Intimate - in the flesh" .)