Crossword Genius

Fight police officer in cell blocks (5)

Ross

I believe the answer is:

wards

'cell blocks' is the definition.
(a ward is a part of a prison)

'fight police officer' is the wordplay.
'fight' becomes 'war' (warring is a kind of fighting).
'police officer' becomes 'DS' (short for detective sergeant).
'war'+'ds'='WARDS'

'in' is the link.

(Other definitions for wards that I've seen before include "Hospital rooms" , "Charges" , "Hospital divisions" .)

I've seen this clue in The Guardian.
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