Benchmark for Met officer's baton? (9)
I believe the answer is:
yardstick
'benchmark' is the definition.
(I've seen this before)
'met officer's baton?' is the wordplay.
'met' means one lot of letters go next to another.
'officer' becomes 'yard' (I am not sure about this - if you are sure you should believe this answer much more).
'baton?' becomes 'stick' (I've seen this in other clues).
'yard'+'stick' is 'YARDSTICK'.
'for' is the link.
Can you help me to learn more?
(Other definitions for yardstick that I've seen before include "Benchmark" , "Measuring rod" , "Measure against which to make comparison" , "Standard base for comparison" , "Gauge" .)