Choose a quiet spot (7)
I believe the answer is:
appoint
'choose' is the definition.
(thesaurus)
'a quiet spot' is the wordplay.
'a quiet' becomes 'ap' (I've seen this in other clues).
'spot' becomes 'point' ('point' can be a synonym of 'spot'**).
'ap'+'point'='APPOINT'
(Other definitions for appoint that I've seen before include "Assign to a duty" , "Designate (job)" , "Give job to" , "Determine (a time/place)" , "Name" .)