Measure US soldier's pet? (5)
I believe the answer is:
corgi
'pet?' is the definition.
(I know that corgi is a type of dog)
'measure us soldier's' is the wordplay.
'measure' becomes 'cor' (I've seen this in other clues).
'us soldier' becomes 'GI' (GI can mean an American soldier).
'cor'+'gi'='CORGI'
(Other definitions for corgi that I've seen before include "Queen's dog?" , "Queen likes this" , "Barker?" , "Royal pet" , "Cardigan, possibly" .)