Attractiveness of cleaner maiden (5)
I believe the answer is:
charm
'attractiveness' is the definition.
(charm is a kind of attractiveness)
'cleaner maiden' is the wordplay.
'cleaner' becomes 'char' (charwoman is a type of cleaner).
'maiden' becomes 'm' (cricket abbreviation).
'char'+'m'='CHARM'
'of' is the link.
(Other definitions for charm that I've seen before include "Group of finches" , "Entrance, bewitch" , "Appeal; trinket" , "Make delighted" , "Trinket on a bracelet" .)