When detectives turn up with underwater detective apparatus? (5)
I believe the answer is:
asdic
'underwater detective apparatus?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'when detectives turn up' is the wordplay.
'when' becomes 'as' (eg 'when I walked' means 'as I walked').
'detectives' becomes 'CID' (abbreviation for Criminal Investigation Department).
'turn up' shows that the letters should be reversed in order.
'cid' backwards is 'dic'.
'as'+'dic'='ASDIC'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for asdic that I've seen before include "Ultrasonic detector" , "Submarine detection device" , "Sound means of detection" , "old detection method" , "aid to detection" .)