Expand, magnify (7)
I believe the answer is:
enlarge
I believe this clue is a double definition.
'expand' is the first definition.
(I've seen this before)
'magnify' is the second definition.
(synonyms)
(Other definitions for enlarge that I've seen before include "Lengthen" , "Broaden, increase" , "Expatiate" , "Make greater" , "Blow up" .)