What does the cryptic crossword clue "Self-directing car without computer control wasting energy (10)" mean?

The definition is "Self-directing". The wordplay uses a deletion. AUTO (synonym="”car”") + NO (synonym="NO") + MOUS (synonym="MOUS") = AUTONOMOUS; definition: "Self-directing" The answer is AUTONOMOUS.

Self-directing car without computer control wasting energy (10)

Guardian Cryptic #28941 | 3 Down | 2022-12-15 flower

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Self-directing car without comp­uter control wasting energy (10)

Self-directing car without computer control wasting energy (10)