Charles spotting game for kids is easily cracked (6)
I believe the answer is:
crispy
'kids is easily cracked' is the definition.
I can't judge whether this definition defines the answer.
'charles spotting game' is the wordplay.
'charles spotting' becomes 'cr' (I can't justify this - if you can you should give a lot more credence to this answer).
'game' becomes 'i-spy' (I Spy is a guessing game).
'cr'+'ispy'='CRISPY'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for crispy that I've seen before include "being invigorating" , "Crunchy, brittle" , "Dry, brittle" , "Tender and brittle" .)