In the middle of the morning, working - then golf! (5)
I believe the answer is:
among
'in the middle of' is the definition.
(I've seen this before)
'the morning working then golf' is the wordplay.
'the morning' becomes 'am'.
'working' becomes 'on'.
'then' says to put letters next to each other.
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'am'+'on'+'g'='AMONG'
(Other definitions for among that I've seen before include "Surrounded by" , "In an assembly of" , "in a group" , "Included with - inside" , "Within" .)