Took a picture that includes an animal (5)
I believe the answer is:
okapi
'an animal' is the definition.
(African mammal)
'took a picture that includes' is the wordplay.
'that includes' indicates the answer is hidden within the clue.
'OKAPI' is hidden within 'took a picture'.
(Other definitions for okapi that I've seen before include "rainforest ruminant" , "African mammal related to giraffe" , "Central African animal" , "Shy Zairean ruminant" , "Horned ruminant" .)