The most common and most likely answer to this crossword clue is the 5 letter word EAGRE
I've seen this crossword clue in The Guardian
E
A
G
R
E
More clues leading to the result EAGRE
- High-flyer changes sides — what a bore
- Bore to go along with putting up one on state benefit
- Bore raring to be heard
- Bore keen to be heard
- Sudden rise in water rate agreed in part
- Bore offering thin fare marks falling off
- Bore is enthusiastic on the air
- Permit energy to be delivered up front after surge in current
- Bore in suit, last one to be promoted to top position
- We agreed to shut up this bore
Buddy explains!

The straight part
We know that "surge in current" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case surge in current = eagre.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 EAGRE mean?
EAGRE adjective- Sharp; sour; acid.
- Sharp; keen; bitter; severe.
- Desirous; keen to do or obtain something.
- Brittle; inflexible; not ductile.
- Not employing lazy evaluation; calculating results immediately, rather than deferring calculation until they are required.
- A tidal bore