The most common and most likely answer to this crossword clue is the 7 letter word LARGEST
I've seen this crossword clue in The Daily Telegraph
L
A
R
G
E
S
T
More clues leading to the result LARGEST
- There’s nothing bigger in case containing plastic rag
- Greatest king in line grows old and decrepit finally
- Somewhat stellar gesture, generous in the extreme
- Greatest finish from scorer, for example, coming up in final
- Greatest tips for retaining energy during final
- Chief seeing 24 with leg broken
- Unending generosity by model with the greatest capacity
- Top star with leg broken
- Biggest girl eats bananas, dropping one
- Most enormous rat’s leg, broken
Buddy explains!
The straight part
We know that "Superlatively extensive" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case superlatively extensive = largest.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 LARGEST mean?
LARGEST adjective- Of considerable or relatively great size or extent.
- Abundant; ample.
- Full in statement; diffuse; profuse.
- Free; unencumbered.
- Unrestrained by decorum; said of language.
- Crossing the line of a ship's course in a favorable direction; said of the wind when it is abeam, or between the beam and the quarter.