Ring Eleanor at the week-end (5)
I believe the answer is:
knell
'ring' is the definition.
(I know that knell is a more specific form of the action ring)
'eleanor at the week-end' is the wordplay.
'eleanor' becomes 'nell' (nickname for Eleanor).
'at' says to put letters next to each other (I've seen this in other clues).
'the week-end' becomes 'k' (end of the word 'week').
'nell' after 'k' is 'KNELL'.
(Other definitions for knell that I've seen before include "Toll, ring" , "''The curfew tolls the ... of parting day'' (Thomas Gray)" , "Funeral toll" , "Toll (bell)" , "Solemn warning" .)