Poem soldier regularly read (3)
I believe the answer is:
ode
'poem' is the definition.
(ode is a type of poem)
'soldier regularly read' is the wordplay.
'regularly read' means one should take alternating letters.
The alternate letters of 'soldier' are 'ODE'.
(Other definitions for ode that I've seen before include "Literary work" , "Poetic composition" , "Poem expressing noble feelings" , "Poem in praise of doe" , "Lines" .)