Despise officer losing heart after minor injury (5)

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

ABH (minor injury), O{ffice}R [losing heart]. It shows how far we have fallen when assault occasioning Actual Bodily Harm is clued in The Times crossword as causing a ‘minor injury’, but I suppose it’s a matter of degree and Grievous Bodily Harm (GBH) is reserved for more serious injuries. Which reminds me of one of my bugbears that many newsreaders and commenters on current affairs insist on referring to Grevious (sic) Bodily Harm.