Time to get insect, strange pet (7)
I believe the answer is:
tantrum
'pet' is the definition.
(I've seen this before)
'time to get insect strange' is the wordplay.
'time' becomes 't'.
'to get' says to put letters next to each other.
'insect' becomes 'ant' (ant is a kind of insect).
'strange' becomes 'rum' (I've seen this before).
't'+'ant'+'rum'='TANTRUM'
(Other definitions for tantrum that I've seen before include "Fit - pet" , "fit of bad temper" , "Childish fit of rage" , "Wobbly" , "Childish fit of anger" .)