Cleaning woman's lorry (9)
I believe the answer is:
cathartic
'cleaning' is the definition.
(thesaurus)
'woman's lorry' is the wordplay.
'woman' becomes 'cath' (short for Catherine).
'lorry' becomes 'artic' (articulated lorry is a semi-trailer truck).
'cath'+'artic'='CATHARTIC'
(Other definitions for cathartic that I've seen before include "Cleansing - purifying" , "Purgative" , "Purging" , "Cleansing - arctic hat (anag)" , "providing a release" .)