Crossword Genius

Instant calls blocked by new PM's predecessors (8)

Ross

I believe the answer is:

mornings

'pm's predecessors' is the definition.
(pm meaning afternoon)

'instant calls blocked by new' is the wordplay.
'instant' becomes 'mo'.
'calls' becomes 'rings' ('ring' can be a synonym of 'call'**).
'blocked by' means one lot of letters goes inside another (I've seen this in other clues).
'new' becomes 'n'.
'rings' going around 'n' is 'rnings'.
'mo'+'rnings'='MORNINGS'

(Other definitions for mornings that I've seen before include "Periods between dawn and noon" , "They're between dawn and noon" , "more than once when he should be getting up?" .)

I've seen this clue in The Guardian.
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