Outgoing individuals sent damaging texts about pet dog (10)
I believe the answer is:
extroverts
'outgoing individuals sent' is the definition.
I can't judge whether this defines the answer.
'damaging texts about pet dog' is the wordplay.
'damaging' indicates an anagram.
'about' indicates putting letters inside.
'pet dog' becomes 'rover' (Rover is a common name for a pet dog. I am not sure about the 'pet' bit.).
'texts' with letters rearranged gives 'extts'.
'extts' enclosing 'rover' is 'EXTROVERTS'.
Can you help me to learn more?
(Other definitions for extroverts that I've seen before include "Outgoing people" , "Makes manifest" .)