The most common and most likely answer to this crossword clue is the 12 letter word ASTRONOMICAL
I've seen this crossword clue in The Daily Telegraph
A
S
T
R
O
N
O
M
I
C
A
L
More clues leading to the result ASTRONOMICAL
- Manorial cost unfortunately very large
- Huge shock! Nostromo alien — can none get lost?
- Giant sail – can’t moor unfortunately
- Huge sort of telescope
- Really, really big on eating great food, no good
- Tremendous macaroni — lots to be used
- Such an observation could construe Mars location
- Huge romantic also getting sloppy
- Stellar tail arcs incredibly around spinning moon
- Huge limo’s not a car for manoeuvring
Buddy explains!
The straight part
We know that "Tremendous" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tremendous = astronomical.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 ASTRONOMICAL mean?
ASTRONOMICAL adjective- Of or relating to astronomy.
- Very large; of vast measure.