The most common and most likely answer to this crossword clue is the 7 letter word IMAGINE
I've seen this crossword clue in The Times
I
M
A
G
I
N
E
More clues leading to the result IMAGINE
- Envisage instruments originally employed in Enigma variation
- Picture in one publication with extreme characters being carted off
- Silver found during one excavation? Fancy!
- Number one drink in West
- Think of a number in the seventies
- Conceive of silver being found in excavation on island
- Picture the writer’s opposed to, enormously at first
- Old number picture
- One enigma, terribly fancy
- Think I’m not in favour of energy
Buddy explains!

The straight part
We know that "Think of" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case think of = imagine.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 IMAGINE mean?
IMAGINE noun- A short fanfic or prompt placing a reader insert in a novel scenario with a character or celebrity.
- To form a mental image of something; to envision or create something in one's mind.
- To believe in something created by one's own mind.
- To assume
- To conjecture or guess
- To use one's imagination
- To contrive in purpose; to scheme; to devise.