Cryptic crossword clue
Grip compound securing molar that’s lost cap 8

The most common and most likely answer to this crossword clue is the 8 letter word FOOTHOLD

I've seen this crossword clue in Financial Times
F
O
O
T
H
O
L
D


Buddy explains!

The straight part
We know that "Grip" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case grip = foothold.
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 FOOTHOLD mean?

FOOTHOLD noun
  1. A solid grip with the feet.
  2. (by extension) A secure position from which it is difficult to be dislodged.
  3. Airhead, beachhead, bridgehead, lodgement.

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