Big order for lager (5)
I believe the answer is:
large
'big' is the definition.
(I know that big can be written as large)
'order for lager' is the wordplay.
'order for' is an anagram indicator.
'lager' with letters rearranged gives 'LARGE'.
(Other definitions for large that I've seen before include "At which criminals possibly are free" , "Lager (anag.)" , "Comprehensive" , "Regal (anag)" , "Massive" .)