Crossword Genius

Spirits supplied by good landlords (6)

Ross

I believe the answer is:

'spirits' is the definition.
(ghost is a kind of spirit)

'good landlords' is the wordplay.
'good' becomes 'g' (abbreviation).
'landlords' becomes 'hosts' (I've seen this before).
'g'+'hosts'='GHOSTS'

'supplied by' is the link.

(Other definitions for ghosts that I've seen before include "Spectres, wraiths", "Spooks, spectres", "Writes for another; Ibsen play", "Apparitions of a dead people", "Spirits or apparitions".)

I've seen this clue in The Telegraph.