Numbers allotted for rugby (6)
I believe the answer is:
sevens
This clue could be a double definition.
'numbers allotted for' is the first definition.
'sevens' can be an answer for 'numbers' (I've seen this before). I'm not certain of the 'allotted for' bit.
'rugby' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for sevens that I've seen before include "Card game; form of rugby" , "Form of Rugby Union" , "77" , "Numbers" , "cards!" .)