Green’s Dictionary of Slang

field n.

(UK black/gang) an area of potential violence.

[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Field - danger-zone, combat area.

SE in slang uses

In compounds

field whiskey (n.)

(US) illicitly distilled whisky.

[US]Randolph & Wilson Down in the Holler 243: field whiskey: n. Common moonshine, not aged or colored.

In phrases

bring (someone) back to the field (v.)

(Aus.) to bring someone down to earth, to undermine their pretensions.

[Aus]T. Peacock More You Bet 8: ‘To bring someone back to the field’ was to cut down someone’s pretensions.
in the field (adj.)

(US black) unmarried, single.

[US]C. Himes If He Hollers 48: ‘You married?’ he asked. I shook my head. ‘Still in the field’.