Crossword Genius

Money tribunal’s head absent for a long period of time (7)

Ross

I believe the answer is:

century

I'm a little stuck... Click here to teach me more about this clue!

'period of time' is the definition.
(century is a kind of period of time)

'money tribunal's head absent for a long' is the wordplay.
I cannot really understand how this works, but
'money' could be 'cent' (I've seen this before) and 'cent' is present in the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for century that I've seen before include "100 years" , "A lot of runs!" , "Group of a hundred" , "One hundred years" , "Period of time" .)

I've seen this clue in The Hindu.
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