Take trouble with exercises (5)
I believe the answer is:
adopt
'take' is the definition.
(adopting is a kind of taking)
'trouble with exercises' is the wordplay.
'trouble' becomes 'ado' (I've seen this before).
'with' says to put letters next to each other.
'exercises' becomes 'pt'.
'ado'+'pt'='ADOPT'
(Other definitions for adopt that I've seen before include "Take into one's family" , "Start to wear" , "Choose as one's own" , "make one's own" , "Acquire" .)