You hunted the moose as Cenlieg requested, but the lore-master's bear-friend did not like the meat you had given it.
'It seems Linden's sensitive stomach is not as grateful as I am for your help. He is of the highest breed, you see, and must be fed lean, tender meat. I promise not to trouble you again, if you can only supply him with some suitable food.
'I have overheard the Lossoth -- wonderful people you know -- saying something about an immense elk-buck who keeps watch over the southern end of the forest. Surely his flanks would be strong and rich for Linden here.
'I think you will find him if you journey south-west into the start of the foothills, just beyond the southern shore.'
The great elk can be found to the south-west of Kauppa-kohta.
Cenlieg has asked you to kill the great elk and bring its flank to him.
Cenlieg is at Kauppa-kohta, east from where you found the elk-buck.
You should return to Cenlieg with the elk-flank you collected.