Crossword puzzle clue "when a major operation begins"

Here are the possible solutions for when a major operation begins clue

Answer
Clue
Relevancy
dday
Clue
When a major operation begins
adaptivecontrol
Clue
Capability of a system to modify its own operation to achieve the best possible mode of operation
chain
Clue
Major retail operation
Definition
to bind with linked rings
drill
Clue
Major operation?
Definition
to bore a hole in
asharp
Clue
Note in B major but not E major
heller
Clue
Creator of Major Major
Definition
(Czech) a Czech monetary unit, also HALER
rank
Clue
Major or major general
Definition
disagreeable in odour or taste
snafu
Clue
Major's major mishap

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