Political party's taken step to create nature reserve? (10)

I believe the answer is:

greenspace

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

'create nature reserve?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'political party's taken step' is the wordplay.
'political party' becomes 'greens' (I've seen this before).
'taken' is a charade indicator (letters next to each other).
'step' becomes 'pace' (synonyms).
'greens'+'pace'='GREENSPACE'

'to' acts as a link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.