Coupon holder managed to hold it up with old reserve (6,4)

'coupon holder' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'managed to hold it up with old reserve' is the wordplay.
'managed' becomes 'ran' (both can mean organised or was in charge of).
'to hold' is an insertion indicator.
'up with' indicates an anagram (letters get chucked up).
'old' becomes 'o' (abbreviation).
'reserve' becomes 'book' (to book something is to reserve it).
'it' mixed up with 'o' can make 'tio'.
'ran' enclosing 'tio' is 'ration'.
'ration'+'book'='RATION-BOOK'

Can you help me to learn more?