Impression about a child according to the time of year (8)
I believe the answer is:
seasonal
'according to the time of year' is the definition.
I can't judge whether this defines the answer.
'impression about a child' is the wordplay.
'impression' becomes 'seal' (seal is a kind of impression).
'about' indicates putting letters inside.
'child' becomes 'son' (male child).
'a'+'son'='ason'
'seal' enclosing 'ason' is 'SEASONAL'.
Can you help me to learn more?
(Other definitions for seasonal that I've seen before include "Like an Easter egg" , "Changing throughout the year" , "Relating to winter, spring" , "Occurring at certain times of the year" , "Fluctuating according to the time of year" .)