Game with small insects (8)
I believe the answer is:
crickets
'insects' is the definition.
(cricket is a kind of insect)
'game with small' is the wordplay.
'game' becomes 'cricket' (cricket is a kind of game).
'with small' becomes 's' (abbreviation - e.g. clothes size. I am not sure about the 'with' bit.).
'cricket'+'s'='CRICKETS'
Can you help me to learn more?
(Other definitions for crickets that I've seen before include "Insects that chirp in chimneys" , "They are chirpy" , "Noisy insects" , "Chirping insects" .)