What is expected by end of week is place in which to relax (4)
I believe the answer is:
park
'place in which to relax' is the definition.
(a park is visited for leisure)
'what is expected by end of week' is the wordplay.
'what is expected' becomes 'par' (an expected standard or level).
'by' is a charade indicator (letters next to each other).
'end of' says to take the final letters.
The last letter of 'week' is 'k'.
'par'+'k'='PARK'
'is' is the link.
(Other definitions for park that I've seen before include "Green or Hyde" , "Pleasure garden" , "Temporarily leave" , "Open public area" , "Open space for recreational use" .)