The most common and most likely answer to this crossword clue is the 4 letter word FARM
I've seen this crossword clue in Independent
F
A
R
M
More clues leading to the result FARM
- Rural establishment a long way off motorway
- Female with weapon in ranch?
- Some of Armenia is agricultural land
- Till first sign of five in the morning about right?
- Cultivate key member
- Building weapon unleashes anger
- Old 7 down had this fine weapon
- Loud weapon that’s more than stable!
- Female member in agricultural business
- Rural set-up that’s distant, miles to the south
Buddy explains!

The straight part
We know that "Old 7D had this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case old 7d had this = farm.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does FARM mean?
FARM noun- A place where agricultural and similar activities take place, especially the growing of crops or the raising of livestock.
- A tract of land held on lease for the purpose of cultivation.
- (usually in combination) A location used for an industrial purpose, having many similar structures
- A group of coordinated servers.
- Food; provisions; a meal.
- A banquet; feast.
- A fixed yearly amount (food, provisions, money, etc.) payable as rent or tax.
- A fixed yearly sum accepted from a person as a composition for taxes or other moneys which he is empowered to collect; also, a fixed charge imposed on a town, county, etc., in respect of a tax or taxes to be collected within its limits.
- The letting-out of public revenue to a ‘farmer’; the privilege of farming a tax or taxes.
- The body of farmers of public revenues.
- The condition of being let at a fixed rent; lease; a lease.
- To work on a farm, especially in the growing and harvesting of crops.
- To devote (land) to farming.
- To grow (a particular crop).
- To give up to another, as an estate, a business, the revenue, etc., on condition of receiving in return a percentage of what it yields; to farm out.
- To lease or let for an equivalent, e.g. land for a rent; to yield the use of to proceeds.
- To take at a certain rent or rate.
- To engage in grinding (repetitive activity) in a particular area or against specific enemies for a particular drop or item.
- To cleanse; clean out; put in order; empty; empty out