At home, slip by artist in shower (8)
I believe the answer is:
rainfall
'shower' is the definition.
(I've seen this before)
'at home slip by artist' is the wordplay.
'at home' becomes 'in' ('in' can be similar in meaning to 'at home').
'slip' becomes 'fall' (fall is a kind of slip**).
'by' says to put letters next to each other.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'in'+'fall'='infall'
'infall' put after 'ra' is 'RAINFALL'.
'in' is the link.
(Other definitions for rainfall that I've seen before include "Precipitation, get out umbrella" , "Amount of water coming down" , "Water falling in drops" , "Climate measure" , "Form of precipitation" .)