Summons (4)
'summons' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for calls that I've seen before include "An Inspector - - (Priestley)" , "Names" , "Brief visits" , "Summons" , "Visits; rings" .)
'summons' is the definition.
(legal summons)
This is the entire clue.
(Other definitions for writ that I've seen before include "Legal order in writing" , "Formal command of law court requiring certain action" , "Warrant, court order" , "Subpoena" , "official order" .)