Small animal, king with it (3)
I believe the answer is:
kit
'small animal' is the definition.
'kit' can be an answer for 'animal' (kit is a kind of animal). I'm unsure of the 'small' bit.
'king with it' is the wordplay.
'king' becomes 'k' (abbreviation for king in chess).
'with' means one lot of letters go next to another.
'k'+'it'='KIT'
Can you help me to learn more?
(Other definitions for kit that I've seen before include "Equipment, clothing" , "Football top, shorts, stockings and boots?" , "Outfit" , "Specialised clothing or set of parts for assembly" , "Young cat" .)