Shipwrecked boy discovered orang and hyena evacuated with another predator (7)
I believe the answer is:
piranha
'another predator' is the definition.
'piranha' can be an answer for 'predator'. I am not certain of the 'another' bit.
'shipwrecked boy discovered orang and hyena evacuated' is the wordplay.
'shipwrecked boy' becomes 'pi' (I am not sure about this - if you are sure you should believe this answer much more).
'discovered' indicates the central letters (dis-covered - outer letters removed).
'and' is a charade indicator (letters next to each other).
'evacuated' means to remove the middle letters (internal letters are evacuated from the word).
The central letters of 'orang' are 'ran'.
'hyena' with its centre removed is 'ha'.
'pi'+'ran'+'ha'='PIRANHA'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for piranha that I've seen before include "Small voracious carnivorous fish" , "Ferocious fish" , "Small carnivorous freshwater fish" , "Voracious tropical fish" , "Efficient flesh remover" .)