Grasshopper in bottom of net caught by a kiddy playing (7)
I believe the answer is:
katydid
'grasshopper' is the definition.
(katydid is a kind of grasshopper)
'bottom of net caught by a kiddy playing' is the wordplay.
'bottom of' indicates one should take the final letters.
'caught by' indicates putting letters inside.
'playing' is an anagram indicator.
The last letter of 'net' is 't'.
'a'+'kiddy'='akiddy'
'akiddy' anagrammed gives 'kaydid'.
't' going inside 'kaydid' is 'KATYDID'.
'in' acts as a link.
(Other definitions for katydid that I've seen before include "insect" , "US bush cricket" , "American grasshopper" , "American bush cricket" , "Large cricket" .)