The most common and most likely answer to this crossword clue is the 7 letter word OERSTED
O
E
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D
More clues leading to the result OERSTED
- Not all cadets reorganised from the right unit
- Field measure long ago appeared in dictionary
- Ring deters wanton magnetism
- Physicist redoes experiment finally after botch-up
- Unit formerly in the dictionary
- Rose is out with a boy — it denotes strength of attraction
- Danish physicist stretched the truth after discarding the vat
- Sorted out internal energy and unit of magnetic field strength
Buddy explains!

The straight part
We know that "Danish physicist" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case danish physicist = oersted.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 OERSTED mean?
OERSTED noun- The CGS unit of magnetizing field (symbol Oe), defined as 1000/4π (≈79.5774715) amperes per meter of flux path.