Hold back a show of disapproval for childish game (8)
I believe the answer is:
peekaboo
'childish game' is the definition.
'peekaboo' can be an answer for 'game' (peekaboo is a kind of game). I am not certain of the 'childish' bit.
'hold back a show of disapproval' is the wordplay.
'hold' becomes 'keep' (keeping is a kind of holding).
'back' shows that the letters should be reversed in order.
'show of disapproval' becomes 'boo' (a boo shows disapproval).
'keep' reversed gives 'peek'.
'peek'+'a'+'boo'='PEEKABOO'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for peekaboo that I've seen before include "Game played with young children" , "Childrens hiding game" , "Infants' hiding-and reappearing game" , "Peeping game" , "Toddler's face-hiding game" .)