A sweetener that Brisbane acquired from Gold Coast has convinced Fremantle to release contracted midfield star Lachie Neale.

The Lions gave up picks six, 19 and 55 in this year's NAB AFL Draft while receiving Neale and selection No.30.

The Lions and Dockers had been locked in a stalemate for most of the NAB AFL Trade Period unable to bridge the gap between Brisbane's initial offer of pick No.5 for Neale and Fremantle's demand for an additional first-round pick.

However, Brisbane finalised a trade with Gold Coast on Wednesday afternoon that helped it finally find common ground with Fremantle.

In the deal, the Lions traded their future round one selection to Gold Coast for pick No.19, the Suns' future second-round selection and a future third-round selection (on traded from Hawthorn).

Neale had been contracted with the Dockers until the end of 2019.

The 25-year-old averaged 30 disposals and seven clearances while playing every game this season and won Fremantle's best and fairest this year, as well as 2016.

"Lachie is a perfect fit for what we are targeting this trade period – an elite midfielder and in the 23-26-year-old age bracket," Brisbane football manager David Noble told lions.com.au.

"Lachie is a quality person and highly respected player who will significantly strengthen our midfield.

"We are excited that Lachie and his partner Jules would choose our club and believe this is a reflection of our continual improvement and growth in the competition.

"We expect Lachie to be a positive influence on our culture as we collectively move forward and strive for success.

"It is also important for us to acknowledge and thank Fremantle for working with us to get this deal done."