Cryptic crossword clue
10 dismissed at the Oval, say, by Lock’s return 6

The most common and most likely answer to this crossword clue is the 6 letter word ROBINS

R
O
B
I
N
S

Buddy explains!

The straight part
We know that "10" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 10 = robins.
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 ROBINS mean?

ROBINS noun
  1. Any of various passerine birds (about 100 species) of the families Muscicapidae, Turdidae and Petroicidae (formerly Eopsaltriidae), typically with a red breast.
  2. A trimming in front of a dress.

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