Marine bird (6)
(Other definitions for gannet that I've seen before include "flyer" , "guzzler?" , "Gluttonous type" , "Solan goose was this bird's former name" , "Act in accordance (with command)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">marine bird</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for seagull that I've seen before include "Main creature" , "Marine bird" , "One sitting atop mast perhaps" , "Avian scavenger" , "Bird paradoxically fond of landfill sites" .)