Fish for any number stored in shed (4)
I believe the answer is:
hunt
'fish for' is the definition.
(thesaurus)
'any number stored in shed' is the wordplay.
'any number' becomes 'n' (I've seen this in other clues).
'stored in' is an insertion indicator.
'shed' becomes 'hut' (I've seen this before).
'n' put inside 'hut' is 'HUNT'.
(Other definitions for hunt that I've seen before include "Search for (prey)" , "Quest" , "Meet - famous mountaineer" , "Chase and kill" , "Organised search" .)