Cryptic crossword clue
Dog-handler’s more switched-on during victory 7-2

The most common and most likely answer to this crossword clue is the 7 plus 2 letter word WHIPPER IN

I've seen this crossword clue in Financial Times
W
H
I
P
P
E
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I
N

Buddy explains!

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 WHIPPER IN mean?

WHIPPER IN noun
  1. A huntsman who keeps the hounds from wandering, and whips them in, if necessary, to the chase.
  2. One who enforces the discipline of a party, and urges the attendance and support of the members on all necessary occasions.

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