Check stadium's interior construction (5)
I believe the answer is:
audit
'check' is the definition.
(an audit is an examination or check)
'stadium's interior construction' is the wordplay.
'interior' means to look at the middle letters.
'construction' indicates anagramming the letters (answer constructed from certain letters).
The centre of 'stadium' is 'tadiu'.
'tadiu' with letters rearranged gives 'AUDIT'.
(Other definitions for audit that I've seen before include "Financial inspection" , "Inspection of a company's books" , "assessment" , "Formally examine" , "Roman Aquae Sulis" .)