Military camp beat Cuba Swallows four nil (7)
I believe the answer is:
bivouac
'military camp' is the definition.
(I've seen this in another clue)
'beat cuba swallows four nil' is the wordplay.
'beat' is an anagram indicator.
'swallows' indicates putting letters inside.
'four' becomes 'IV' (Roman numerals for four).
'nil' becomes 'O' (O resembles 0).
'cuba' is an anagram of 'buac'.
'iv'+'o'='ivo'
'buac' going around 'ivo' is 'BIVOUAC'.
(Other definitions for bivouac that I've seen before include "Temporary camp without tents or cover" , "Temporary camp for soldiers" , "Temporary and basic encampment" , "Pass the night in the open air" , "A temporary army camp" .)