Normal for America to have uranium left (5)
I believe the answer is:
usual
'normal' is the definition.
(I've seen this before)
'america to have uranium left' is the wordplay.
'america' becomes 'usa' (United States of America).
'to have' means one lot of letters goes inside another.
'uranium' becomes 'U' (U is the chemical symbol for uranium).
'left' becomes 'l' (common abbreviation).
'usa' placed around 'u' is 'usua'.
'usua'+'l'='USUAL'
'for' acts as a link.
(Other definitions for usual that I've seen before include "regarding customs?" , "Customary, routine" , "Drink repeatedly taken" , "Typical" , "Common or garden" .)