Tackle small family that's all over kids (8)
I believe the answer is:
goatskin
'that's all over kids' is the definition.
I can't judge whether this definition defines the answer.
'tackle small family' is the wordplay.
'tackle small' becomes 'goats' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'family' becomes 'kin' (synonyms).
'goats'+'kin'='GOATSKIN'
Can you help me to learn more?
(Other definitions for goatskin that I've seen before include "Leather from nanny or billy?" , "Billy's hide?" , "Hide Billy or Nanny" , "Leather - wine holder of old" , "Type of leather - a song kit (anag)" .)