Crossword Genius

Stoppage in force once beginning to slow (6)

Ross

I believe the answer is:

'stoppage' is the definition.
(I've seen this before)

'force once beginning to slow' is the wordplay.
'force once' becomes 'stasi' (secret police of East Germany).
'beginning to' suggests taking the first letters.
The first letter of 'slow' is 's'.
'stasi'+'s'='STASIS'

'in' is the link.

(Other definitions for stasis that I've seen before include "Standstill", "Stoppage of circulation or stagnation", "Enduring state", "Inactive state", "Assist with stagnant condition".)

I've seen this clue in The Guardian.