This is a reversal clue - look for indicators like 'back', 'returned', 'up' (in down clues), or 'west' (in across clues)
Reverse the letters of a word from the clue
Answer: PATRIARCHY | Definition: 'arrangement favouring men' | Wordplay: An envelope (‘in’) of RIAR, a reversal (‘the wrong way’) of R (‘right’) plus AIR (‘manner’) in PATCHY (‘incoherent’).