Steep (9)
'steep' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for soak that I've seen before include "Saturate" , "Douse, drench" , "Habitual drinker (slang)" , "Make extremely wet" , "Steep in water" .)
'steep' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for expensive that I've seen before include "Highly-priced" , "not going for a song" , "Costing a lot of money" , "Very costly or dear" , "priceless" .)
'steep' is the definition.
(marinating is a kind of steeping)
This is all the clue.
(Other definitions for marinate that I've seen before include "Soak food in flavoured liquid before cooking" , "Soak meat in a sauce" , "steep in liquor" , "Soak or steep meat or fish" , "Soak meat in seasoned liquid before cooking" .)