Soldiers link the god of war with little Harry and son (8)
I believe the answer is:
marshals
'soldiers link' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot see how one could define the other.
'god of war with little harry and son' is the wordplay.
'god of war' becomes 'mars' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'little' suggests taking the first letters.
'and' says to put letters next to each other.
'son' becomes 'als' (I can't explain this - if you can you should give a lot more credence to this answer).
The initial letter of 'harry' is 'h'.
'mars'+'h'+'als'='MARSHALS'
'the' is the link.
(Other definitions for marshals that I've seen before include "Arranges" , "Chief officers" , "Officials" , "Crowd-controllers at large public events" .)