Normally a second inspection secures uranium (2,3,5)
I believe the answer is:
as per usual
'normally' is the definition.
(I've seen this before)
'a second inspection secures uranium' is the wordplay.
'second' becomes 's' (common abbreviation).
'inspection' becomes 'perusal' (I've seen this before).
'secures' is an insertion indicator.
'uranium' becomes 'u' (U is the chemical symbol for uranium).
'perusal' enclosing 'u' is 'perusual'.
'a'+'s'+'perusual'='AS PER USUAL'
(Other definitions for as per usual that I've seen before include "In the customary manner" , "in customary style" , "Predictably" , "Like always" , "Normally" .)