In a fashion, poetry has metre (4)
I believe the answer is:
mode
'in a fashion' is the definition.
I can't tell whether this defines the answer.
'poetry has metre' is the wordplay.
'poetry' becomes 'ode' (I've seen this before).
'has' says to put letters next to each other.
'metre' becomes 'm' (synonyms).
'ode' put after 'm' is 'MODE'.
Can you help me to learn more?
(Other definitions for mode that I've seen before include "Fashion in dome" , "Fashion; way of performing" , "Style; statistical value" , "Fashion - look" , "Style, method" .)