My number included rhino (5)
I believe the answer is:
money
'rhino' is the definition.
(thesaurus)
'my number included' is the wordplay.
'number' becomes 'one' (one is a kind of number).
'included' is an insertion indicator.
'my' going around 'one' is 'MONEY'.
(Other definitions for money that I've seen before include "Lucre" , "Cash, notes" , "ready" , "See 7" , "Currency; wealth" .)