Smell strongly (4)
(Other definitions for stir that I've seen before include "cooler" , "unrest" , "fuss" , "Mix or agitate" , "Whisk or rouse" .)
(Other definitions for eels that I've seen before include "Snakes found in lees" , "Abstract nineteen sixties style" , "Water snakes twisting in lees" , "Snakelike fish" , "Snakes wriggling in lees" .)
(Other definitions for rank that I've seen before include "(Taxi) stand" , "sort" , "Excessive" , "Position; foul-smelling" , "Position in hierarchy" .)
'smell strongly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reek that I've seen before include "Smell, like a Kerry mountain?" , "Smell of smoke in Kerry?" , "terrible smell" , "Does Croagh Patrick smell?" , "Whiff" .)
(Other definitions for musk that I've seen before include "Glandular secretion from a male deer, used in making perfume" , "Substance from deer used as basis of perfumes" , "Secretion from a male deer, used in perfumery" , "Body odour" , "Perfume substance" .)