Engineer may scorn radar, sonar, etc (8)
I believe the answer is:
acronyms
'radar sonar etc' is the definition.
I can't judge whether this defines the answer.
'engineer may scorn' is the wordplay.
'engineer' is an anagram indicator.
'may'+'scorn'='mayscorn'
'mayscorn' with letters rearranged gives 'ACRONYMS'.
Can you help me to learn more?
(Other definitions for acronyms that I've seen before include "entities formed initially, one can say" , "Words made from the initials of others" , "Corny Sam makes words from first letters of other words" , "Words formed from the initials of others" , "Words made from first letters of other words" .)