Bumped into Romeo, in charge of weights and measures (6)

I believe the answer is:

metric

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'weights and measures' is the definition.
I know that 'measures' relates to this answer.

'bumped into romeo in charge' is the wordplay.
'bumped into' becomes 'met' (I've seen this before).
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'in charge' becomes 'ic' (abbreviation for 'in charge').
'met'+'r'+'ic'='METRIC'

'of' is the link.

Can you help me to learn more?

(Other definitions for metric that I've seen before include "Non-Imperial system of measurement" , "Of modern measuring units" , "Successor to imperial (system)" , "Relating to verse - based on the metre" , "System using litre and gram as units" .)

I've seen this clue in The Telegraph.

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