Ashes — commonly seen in the last 2 months (5)
I believe the answer is:
ember
'ashes commonly seen' is the definition.
I can't tell whether this defines the answer.
'in the last 2 months' is the wordplay.
'in' is an insertion indicator.
'last' says to take the final letters.
'e' becomes 'ber' (I am not sure about this - if you are sure you should believe this answer much more).
'months' becomes 'm'.
The final letter of 'the' is 'e'.
'e'+'ber'='eber'
'eber' going around 'm' is 'EMBER'.
Can you help me to learn more?
(Other definitions for ember that I've seen before include "Fire remnant" , "One smouldering" , "Wood still burning" , "It glows in dying fire" , "Material in dying fire" .)