Ditch wild gardenia (8)

I believe the answer is:

drainage

'ditch' is the definition.
(drainage ditch is a kind of ditch)

'wild gardenia' is the wordplay.
'wild' is an anagram indicator.
'gardenia' anagrammed gives 'DRAINAGE'.

(Other definitions for drainage that I've seen before include "Facility for water removal" , "Means of removing water" , "System to manage waste water" , "Evacuation -- gardenia (anag)" , "System of waste channels" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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