Very happy to stake a birdhouse for the Reverend (4-1-4)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

“the Reverend” meaning the Reverend Spooner Spoonerism of ‘hock a coop’=”stake a birdhouse” ‘hock’ as in ‘pawn’ or ‘use as a deposit’, similar to “stake” meaning ‘pledge’ or ‘put at risk’