The most common and most likely answer to this crossword clue is the 4 plus 3 letter word OHMS LAW
I've seen this crossword clue in Financial Times
O
H
M
S
L
A
W
More clues leading to the result OHMS LAW
- How Mal’s broken rule in physics
- Show Mal bizarre scientific theory
- I’m surprised by medium salad being something important for electricians
- Current rule's mantra — to adopt hard stance at first on litigation
- Expression of pain by man having shredded cabbage leads to a theory
- ‘On Her Majesty’s Service’ on fronts of letters aligned with current regulation?
Buddy explains!
The straight part
We know that "something important for electricians" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case something important for electricians = ohms law.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.