Pavlova does not compile the crosswords and has no connection with the compilers.
Pavlova provides these solutions solely as a public service. There is no guarantee of accuracy, but Pavlova has been enjoying solving cryptic crosswords for many years, and is usually confident of the solutions posted!
Once again the Observer Everyman cryptic crossword provides some well-crafted clues which illustrate a few of the fiendish ways that expert compilers use to keep us entertained!
Observer Everyman 5/8/17
18D: Sincere, not caring? Not he. (7)
‘Not caring’ is HEARTLESS. Removing the letters HE gives the answer, a synonym of sincere.
8D: Structure for play with unknown actors in club one organised. (6, 6)
‘Structure for play’ is the definition. ‘Unknown’ is often used for X, Y or Z (as in an equation such as Y = X+2). Here it is Y and followed by CAST (ie ‘Actors’) inside an anagram of CLUB ONE. Note how the word ‘actors’ leads us down the garden path by suggesting a different meaning for ‘play’!