Free time absorbed by construction toy (3,2)
I believe the answer is:
let go
'free' is the definition.
(I've seen this before)
'time absorbed by construction toy' is the wordplay.
'time' becomes 't' (abbreviation).
'absorbed by' indicates putting letters inside.
'construction toy' becomes 'lego' (toy bricks).
't' inserted into 'lego' is 'LET GO'.
(Other definitions for let go that I've seen before include "Set at liberty, loose grip on" , "Loose one's grip" , "Relinquish one's grip" , "Dismiss (from ones thoughts?)" , "Release or permit to depart" .)