Maximum allowed to increase tenfold, essentially (5)
I believe the answer is:
limit
'maximum' is the definition.
(I've seen this in another clue)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for limit that I've seen before include "Keep in" , "Extremity" , "Furthest point" , "Cutoff point" , "Outer extent" .)