Passed a territory containing grave (6)

I believe the answer is:

sedate

'grave' is the definition.
(I know that grave can be written as sedate)

'passed a territory containing' is the wordplay.
'containing' indicates the answer is hidden within the clue (I've seen 'contained' mean this).
'SEDATE' is hidden in the letters of 'passed a territory'.

(Other definitions for sedate that I've seen before include "Calm or spectral appartition" , "Give tranquilliser to" , "Calm, not flighty" , "Calm and demure" , "Calm, unhurried" .)

I've seen this clue in The Guardian.

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