The most common and most likely answer to this crossword clue is the 7 letter word ENDORSE
I've seen this crossword clue in The Times
E
N
D
O
R
S
E
More clues leading to the result ENDORSE
- Point or points to support
- Approve last one in ‘unt?
- What’s found inside vendor sent back
- Back last nag, not the first
- Behind Cockney Trotter’s back
- Support goal, heading off Arab, perhaps
- Support staff kept back in quarters
- Approve funny red nose
- Back final Derby finisher, say, having squandered lead
- Finish 16, head off back
Buddy explains!

The straight part
We know that "Approve" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case approve = endorse.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 ENDORSE mean?
ENDORSE noun- A diminutive of the pale, usually appearing in pairs on either side of a pale.
- To support, to back, to give one's approval to, especially officially or by signature.
- To write one's signature on the back of a cheque, or other negotiable instrument, when transferring it to a third party, or cashing it.
- To give an endorsement.