Job for pal, mixing building material (9)
I believe the answer is:
placement
'job' is the definition.
(I've seen this before)
'pal mixing building material' is the wordplay.
'mixing' indicates an anagram.
'building material' becomes 'cement' (cement is a kind of building material).
'pal' with letters rearranged gives 'pla'.
'pla'+'cement'='PLACEMENT'
'for' is the link.
(Other definitions for placement that I've seen before include "location" , "Arrangement" , "Temporary posting" , "seating for dinner" , "period of work experience" .)