Cook, using some steam and little water (4)
I believe the answer is:
stew
'cook' is the definition.
(stewing is a type of cooking)
'some steam and little water' is the wordplay.
'some' suggests taking the first letters.
'and' is a charade indicator (letters next to each other).
'little water' becomes 'tew' (I am not sure about this - if you are sure you should believe this answer much more).
The initial letter of 'steam' is 's'.
's'+'tew'='STEW'
'using' is the link.
Can you help me to learn more?
(Other definitions for stew that I've seen before include "Cook using pot" , "tart" , "Meat and veg dish" , "Agitation; food" , "Cook; worry" .)