Workers working, favouring active involvement (5-2)
I believe the answer is:
hands on
'involvement' is the definition.
(I have seen 'personal involvement' mean 'hands on' so perhaps 'involvement' could also mean 'hands on')
'workers working favouring active' is the wordplay.
I cannot really see how this works, but
'workers' could be 'hands' (hand is a kind of worker) and 'hands' is found in the answer.
'working' could be 'on' (e.g. a machine is working or on) and 'on' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for hands on that I've seen before include "personal involvement" , "involving practical skill" , "Inviting active participation" , "turns over" , "Involving practical experience" .)