Daily in circulation, originally thinner (7)
I believe the answer is:
cleaner
'daily' is the definition.
(dated term for a woman cleaner)
'circulation originally thinner' is the wordplay.
'originally' indicates taking the first letters.
'thinner' becomes 'leaner' ('lean' can be a synonym of 'thin').
The initial letter of 'circulation' is 'c'.
'c'+'leaner'='CLEANER'
'in' is the link.
(Other definitions for cleaner that I've seen before include "More unblemished - charwoman" , "Maybe Daily" , "Eg, launderer, duster" , "Char; less dirty" , "Daily help" .)