Obtain from huge tin (3)
I believe the answer is:
get
'obtain' is the definition.
('get' can be a synonym of 'obtain')
'from huge tin' is the wordplay.
'from' indicates the answer is hidden within the clue.
'GET' can be found hidden inside 'huge tin'.
(Other definitions for get that I've seen before include "Escape" , "Understand" , "Fetch or obtain" , "Acquire" , "Receive; obtain" .)