The most common and most likely answer to this crossword clue is the 6 letter word CORNER
I've seen this crossword clue in Independent
C
O
R
N
E
R
More clues leading to the result CORNER
- Trap kick on football pitch
- Bronwen regularly invading my secret place
- Sort of kick gutless officer investigating deaths
- Trap large bird in flight; inert, remove skin
- Hunt down crook
- See 28 across
- Trap 22
- Where seconds do the work of a minute
- Control care of Queen taking Rook and Knight
- Trap heartless medical examiner
Buddy explains!

The straight part
We know that "secret place" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case secret place = corner.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 CORNER mean?
CORNER noun- The point where two converging lines meet; an angle, either external or internal.
- An edge or extremity; the part farthest from the center; hence, any quarter or part, or the direction in which it lies.
- A secret or secluded place; a remote or out of the way place; a nook.
- An embarrassing situation; a difficulty.
- A sufficient interest in a salable security or commodity to allow the cornering party to influence prices.
- (heading) Relating to the playing field.
- A place where people meet for a particular purpose.
- A point scored in a rubber at whist.
- To drive (someone or something) into a corner or other confined space.
- To trap in a position of great difficulty or hopeless embarrassment.
- To put (someone) in an awkward situation.
- To get sufficient command of (a stock, commodity, etc.), so as to be able to manipulate its price.
- To turn a corner or drive around a curve.
- To handle while moving around a corner in a road or otherwise turning.
- To supply with corners.