More orderly, I had to get in line (6)
I believe the answer is:
tidier
'more orderly' is the definition.
('tidy' can be similar in meaning to 'orderly')
'i had to get in line' is the wordplay.
'i had' becomes 'id' (I'd).
'to get in' means one lot of letters goes inside another.
'line' becomes 'tier' (tier is a kind of line**).
'id' put inside 'tier' is 'TIDIER'.
(Other definitions for tidier that I've seen before include "Trigger" , "More presentable" , "'Neater, in better order (6)'" , "not so disorderly" , "more organised" .)