The most common and most likely answer to this crossword clue is the 12 letter word SUPERCHARGES
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The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SUPERCHARGES mean?
SUPERCHARGES verb- To increase the power of an internal combustion engine (either Otto or Diesel cycle) by compressing the inlet air with power extracted from the crankshaft.
- To make faster or more powerful.
- To overlay one charge upon another.