Maiden fifty recorded after wild iguana holds game up (9)
I believe the answer is:
inaugural
'maiden' is the definition.
('inaugural' can be a synonym of 'maiden')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for inaugural that I've seen before include "Of an opening ceremony" , "Marking the beginning of, eg, an institution" , "It may be delivered" , "Maiden" , "President's address" .)