Doctor hiding whisky in laundry machine (5)
I believe the answer is:
dryer
'laundry machine' is the definition.
(I've seen this before)
'doctor hiding whisky' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'hiding' means one lot of letters goes inside another.
'whisky' becomes 'rye' (rye is a kind of whisky).
'dr' placed around 'rye' is 'DRYER'.
'in' is the link.
(Other definitions for dryer that I've seen before include "Moisture-extracting machine" , "Airer" , "It removes moisture" , "Laundry machine" , "tumbler, perhaps" .)