Try to think of a more powerful solution (11)
I believe the answer is:
concentrate
'think of a more powerful solution' is the definition.
'concentrate' can be an answer for 'think' (I've seen this before). I'm unsure of the 'of a more powerful solution' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for concentrate that I've seen before include "Focus - attend carefully" , "Think" , "Focus one's thoughts" , "Increase the strength of (a solution)" , "Don't daydream!" .)