Crossword Genius

Soldier on favourite wall (7)

Ross

I believe the answer is:

parapet

'wall' is the definition.
(I know that parapet is a type of wall)

'soldier on favourite' is the wordplay.
'soldier' becomes 'para' (short for paratrooper).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'favourite' becomes 'pet' (synonyms).
'para'+'pet'='PARAPET'

(Other definitions for parapet that I've seen before include "Low wall round edge of balcony" , "works" , "keep overlooking this?" , "Wall at roof's edge" , "Protective cover" .)

I've seen this clue in The Mirror.
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