Nigerian ready to broadcast in North America (5)
I believe the answer is:
naira
'nigerian ready' is the definition.
(currency or 'ready' of Nigeria)
'broadcast in north america' is the wordplay.
'broadcast' becomes 'air' (synonyms).
'in' means one lot of letters goes inside another.
'north america' becomes 'na'.
'air' going inside 'na' is 'NAIRA'.
'to' is the link.
(Other definitions for naira that I've seen before include "African rhino" , "Foreign bread" , "piece of Nigerian money" , "African settler" , "foreign exchange" .)