Office plods every now and again lost discipline (5)
I believe the answer is:
field
'lost discipline' is the definition.
'field' can be an answer for 'discipline' ('field' can be a synonym of 'discipline'). I'm unsure of the 'lost' bit.
'office plods every now and again' is the wordplay.
'every now and again' means one should take alternating letters.
'office'+'plods'='officeplods'
The alternating letters of 'officeplods' are 'FIELD'.
Can you help me to learn more?
(Other definitions for field that I've seen before include "See 20" , "Piece of land for crops, pasture etc" , "Sphere of endeavour" , "Games area" , "Sphere (of activity)" .)