Holy soldiers lament having interred one saint somewhere inside church (8)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

SA (the Salvation Army, holy soldiers), + I S(ain)T in CRY, lament. I found this tricky to parse! But shouldn’t have. My father always had a soft spot for the Sally Army; he said that during the war (ie WWII) they would do anything, go anywhere to support the war effort.