One member to broadcast, with little hesitation to be a wrecker (8)

I believe the answer is:

impairer

'a wrecker' is the definition.
(someone who wrecks or impairs things)

'one member to broadcast with little hesitation' is the wordplay.
'one' becomes 'I' (Roman numeral).
'member' becomes 'mp' (Member of Parliament).
'to broadcast' becomes 'air' (to air on TV).
'with' means one lot of letters go next to another.
'little hesitation' becomes 'er' (expression of hesitation).
'i'+'mp'+'air'+'er'='IMPAIRER'

'to be' acts as a link.

I've seen this clue in The Guardian.

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.