Become larger (4)
'become larger' is the definition.
(synonyms)
This is all the clue.
(Other definitions for grow that I've seen before include "Expand" , "Increase in size" , "Burgeon" , "Mature" , "Become bigger" .)
'become larger' is the definition.
(expanding is a kind of becoming larger)
This is all the clue.
(Other definitions for expand that I've seen before include "Spread out" , "Broaden" , "increasingly elaborate" , "Fill out" , "inflation" .)