Solvers go astray with blond, getting new ideas

I believe the answer is:

young blood

I'm a little stuck... Click here to teach me more about this clue!

(Other definitions for young blood that I've seen before include "(Infusion of) fresh strength" , "renews when brought in" , "Fresh intake of personnel (colloq.)" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app