Father also included creature (5)
I believe the answer is:
Here is my best explanation:
'creature' is the definition.
(panda is a type of creature)
'father also included' is the subsidiary indication.
'father' becomes 'pa' (pa is a kind of father).
'also' becomes 'and' (I've seen this before).
'included' indicates putting letters inside.
'pa' going around 'and' is 'panda'.
(Other definitions for panda that I've seen before include "Bear-like creature", "giant animal", "Black-and-white bear", "Police car", "Exotic animal", "Raccoon-like animal", "Endangered bamboo eater", "Bear-like mammal of China", "Large black-and-white herbivorous mammal" and "shoots lover".)