Possible Clues:

• Colour of military uniform
• Drably coloured security device for motorist, say
• Army fabric
• Olive brown
• Finishes off work (with tea break) on one's material
• Chinos shade
• Outer surfaces of knee-length anorak, one in strong fabric
• Uniform choice, as in 1900 or with the Falklands factor
• Dull brownish
• Broadcast means to enter vehicle with military associations