Goal of zoochoric organism is conveyance, primarily - inside a bird for example (8)

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

END (goal = target), then first letters (primarily) of O [f] Z [oochoric] O [rganism] I [s] C [onveyance]. Extended definition: zoochoric and endozoic both refer to seeds (or other plant matter) consumed by an animal and then deposited somewhere else at the other end of its digestive process.