Cleaner scrubs overalls after pocketing tips (4)
I believe the answer is:
soap
'cleaner' is the definition.
(I know that soap is a type of cleaner)
'scrubs overalls after pocketing tips' is the wordplay.
'tips' says to take the initial letters (tip can refer to the top end of something).
The first letters of 'scrubs overalls after pocketing' is 'SOAP'.
(Other definitions for soap that I've seen before include "TV programme; wash" , "Cleansing agent" , "Serialised drama" , "Day-to-day TV series" , "Coronation Street?" .)