Dangerous creature runs round outside hotel and inside (5)
I believe the answer is:
rhino
'dangerous creature' is the definition.
'rhino' can be an answer for 'creature' (I have seen 'Horned creature ' mean 'rhino' so perhaps 'creature' could also mean 'rhino'). I'm unsure of the 'dangerous' bit.
'runs round outside hotel and inside' is the wordplay.
'runs round' becomes 'ro' (I can't explain this - if you can you should believe this answer much more).
'outside' is an insertion indicator.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'and' is a charade indicator (letters next to each other).
'inside' becomes 'in'.
'h'+'in'='hin'
'ro' going around 'hin' is 'RHINO'.
Can you help me to learn more?
(Other definitions for rhino that I've seen before include "old money?" , "wild beast" , "endangered creature" , "When provoked, one may charge" , "one still charges in Africa" .)