Widen (6)
'widen' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for broaden that I've seen before include "In one direction, expand" , "Extend" , "Make wider" , "Make wide or liberal, perhaps the mind" , "Widen" .)
'widen' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for expand that I've seen before include "Walk through water" , "Branch out" , "Mushroom" , "Increase in bulk or importance" , "balloon" .)
'widen' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spread that I've seen before include "Apply thinly" , "Apply in a smooth coating" , "Scatter around" , "Extend -- feast" , "Soft paste; large meal" .)
'widen' is the definition.
(dilating is a kind of widening)
This is all the clue.
(Other definitions for dilate that I've seen before include "Make or become wider" , "Widen as eye pupils may" , "Widen like eye pupils" , "Expand - talk at length" , "Become wider or larger as eye pupils may" .)