Check uranium found in mine passage (5)
I believe the answer is:
audit
'check' is the definition.
(I've seen this before)
'uranium found in mine passage' is the wordplay.
'uranium' becomes 'U' (U is the chemical symbol for uranium).
'found in' is an insertion indicator.
'mine passage' becomes 'adit' (I've seen this before).
'u' placed inside 'adit' is 'AUDIT'.
(Other definitions for audit that I've seen before include "Inspection of a company's books" , "Financial check" , "Financial investigation" , "Investigate" , "Inspect accounts" .)