Patient chap left books in collection of odds and ends (3,3)
I believe the answer is:
job lot
'collection of odds and ends' is the definition.
(I've seen this before)
'patient chap left books' is the wordplay.
'patient chap' becomes 'job' (the Biblical figure Job was famously patient).
'left' becomes 'l' (common abbreviation).
'books' becomes 'ot' (Old Testament).
'job'+'l'+'ot'='JOB-LOT'
'in' is the link.
(Other definitions for job lot that I've seen before include "Collection of cheap or miscellaneous items" , "Collection of miscellaneous articles bought together" , "Miscellaneous group of articles for sale" , "Collection under the hammer" , "Mixed collection sold together" .)