Good-looking police officer retiring (5)
I believe the answer is:
dishy
'good-looking' is the definition.
(I've seen this before)
'police officer retiring' is the wordplay.
'police officer' becomes 'DI' (detective inspector).
'retiring' becomes 'shy' (I've seen this before).
'di'+'shy'='DISHY'
(Other definitions for dishy that I've seen before include "Good-looking (informal)" , "Attractive" , "Handsome" , "Good-looking (colloq.)" , "Informally good-looking, like plate?" .)