Cryptic crossword clue
Was an engineer first support for Rolling Stones drummer? 5

The most common and most likely answer to this crossword clue is the 5 letter word WATTS

I've seen this crossword clue in Financial Times
W
A
T
T
S

Buddy explains!

The straight part
We know that "Rolling Stones drummer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rolling stones drummer = watts.
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 WATTS mean?

WATTS noun
  1. In the International System of Units, the derived unit of power; the power of a system in which one joule of energy is transferred per second. Symbol: W

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