After restructuring, modernisation is excluded for figure below the line (11)
I believe the answer is:
denominator
'figure below the line' is the definition.
I can't tell whether this defines the answer.
'after restructuring modernisation is excluded' is the wordplay.
'after restructuring' is an anagram indicator.
'excluded' indicates named letters should be taken away.
'modernisation' with 'is' removed is 'modernation'.
'modernation' with letters rearranged gives 'DENOMINATOR'.
'for' is the link.
Can you help me to learn more?
(Other definitions for denominator that I've seen before include "Lower number" , "Divisor" , "Lower half of fraction (could be common!)" , "what's under the line?" .)