Darling gets left in shower (4)
I believe the answer is:
pelt
'shower' is the definition.
(thesaurus)
'darling gets left' is the wordplay.
'darling' becomes 'pet' ('pet' can be a synonym of 'darling').
'gets' indicates putting letters inside (gets can mean captures or absorbs).
'left' becomes 'l' (common abbreviation).
'pet' enclosing 'l' is 'PELT'.
'in' is the link.
(Other definitions for pelt that I've seen before include "what rain might do" , "Hurl missiles at" , "Animal skin with hair still on it" , "Subject to bombardment" , "Run very quickly" .)