The most common and most likely answer to this crossword clue is the 7 letter word TRICKLE
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More clues leading to the result TRICKLE
- Fool left before the end of Satie’s slow movement
- Cause to laugh about river becoming thin stream
- Run with a dribble to bamboozle the French
- Minor flow to divert skirting river
- Accumulate power from hoax accusation about article in France-Soir
- Catch when touring river a few drops
- Limited flow in river accommodated by fish, in a way
- Delight crossing minimal river, it being this?
- Cheat the French to let a little flow
- Drop gets player finally into touch
Buddy explains!

The straight part
We know that "Accumulate power" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case accumulate power = trickle.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 TRICKLE mean?
TRICKLE noun- A very thin river.
- A very thin flow; the act of trickling.
- To pour a liquid in a very thin stream, or so that drops fall continuously.
- To flow in a very thin stream or drop continuously.
- To move or roll slowly.