Clue: Put in the picture about Holland, 18 bypassed Spain (9)
Answer: ENLIGHTEN
Explanation: Put in the picture about Holland, 18 bypassed Spain (9)
NL ("Holland") in EIGHTE(e)N ("18" with E ("Spain") bypassed) 
Not satisfied with NL for Holland, as technically speaking, Holland is part of the Netherlands, although Holland is often used loosely to mean all of the Netherlands. There was no reason why Redshank couldn't have used Netherlands in the clue.