Make bigger space with lager ordered (7)
I believe the answer is:
enlarge
'make bigger' is the definition.
(I've seen this before)
'space with lager ordered' is the wordplay.
'space' becomes 'en'.
'with' is a charade indicator (letters next to each other).
'ordered' indicates anagramming the letters.
'lager' with letters rearranged gives 'large'.
'en'+'large'='ENLARGE'
(Other definitions for enlarge that I've seen before include "Describe in more detail" , "Make greater" , "Grow" , "Wax" , "Increase in size" .)