Cryptic crossword clue
Sentimentality in car, touching hand, say, as an extra element? 3,4,7

The most common and most likely answer to this crossword clue is the 3 plus 4 plus 7 letter word FOR GOOD MEASURE

I've seen this crossword clue in The Daily Telegraph
F
O
R
G
O
O
D
M
E
A
S
U
R
E

Buddy explains!

The straight part
We know that "as an extra element" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case as an extra element = for good measure.
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.

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