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 "Black and white Chinese bear", "Mammal, giant or red", "Black and white animal", "See 17", "Bear-like creature", "Animal native to the bamboo forests of China and Tibet", "See 11", "Bamboo-eater", "Endangered bamboo eater" and "Endangered animal".)