Cleaner aims to develop personal quality (8)
I believe the answer is:
charisma
'personal quality' is the definition.
'charisma' can be an answer for 'quality' (charisma is a kind of quality). I'm not sure about the 'personal' bit.
'cleaner aims to develop' is the wordplay.
'cleaner' becomes 'char' (charwoman is a type of cleaner).
'to develop' indicates anagramming the letters.
'aims' is an anagram of 'isma'.
'char'+'isma'='CHARISMA'
Can you help me to learn more?
(Other definitions for charisma that I've seen before include "Person's magnetic charm" , "magnetic quality" , "That special gift" , "it inspires loyalty" , "Personal attractiveness" .)