Search for food (6)
I believe this is a double definition.
'search' is the first definition.
(I know that grub is a more specific form of search)
'food?' is the second definition.
(grub can informally mean food)
'for' is the link.
(Other definitions for grub that I've seen before include "Larva; dig shallowly" , "Food (informal)" , "Larva; food (sl.)" , "Nosh - larva" , "Caterpillar - food" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">search for food</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for forage that I've seen before include "Hunt for food or provisions" , "sort of cap" , "Rummage, search for" , "Plunder; rummage" , "Wander and feed" .)