Gaining knowledge (8)
I believe the answer is:
learning
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gaining knowledge</span>' is the definition.<br/ ><span class="explanation-format__explanation">('learn' can be a synonym of 'gain knowledge')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for learning that I've seen before include "Large inn (anag)" , "Instruction" , "A little of it is said to be a dangerous thing" , "Discovering, finding out" , "Cognitive process of acquiring skill or knowledge" .)