Hammond has performed in concert halls and at festivals across Europe, and is regularly broadcast on BBC Radio 3 and other European radio networks. She has collaborated with artists including the Carducci, Brodsky, Endellion, and Badke quartets, and Henning Kraggerud, Andrew Kennedy, Jennifer Pike, and Lawrence Power. Clare has appeared as a concerto soloist with the Philharmonia, BBC Symphony Orchestra, BBC National Orchestra of Wales, Warsaw Philharmonic, City of Birmingham Symphony Orchestra, Royal Philharmonic Orchestra, Royal Liverpool Philharmonic Orchestra, Ulster Orchestra and Swedish Chamber Orchestra.[4]
Hammond has a strong interest in Polish music and culture and co-curated a centenary festival for Andrzej Panufnik at King's Place in London.[8] She has toured Poland on multiple occasions, and performed at the Chopin and his Europe Festival in Warsaw in 2014.[9]