Duo (clarinet-piano) suggestions:
C. della Giacoma: Fantasia "Cavalleria Rusticana"
A. Giampieri: Il Carnavale di Venezia
P. Sarasate: Carmen Fantasia, (arr. Baldeyrou)
C. Debussy, Première rhapsodie pour clarinette et piano
C. M. von Weber, Grand Duo Concertant
D. Lovreglio: Fantasia per clarinetto su motivi de La Traviata di Verdi
F. Mendelssohn, Sonata para clarinet y piano en Mib
L. Bassi: Concert Fantasia on Themes from Verdi's Rigoletto
C. della Giacoma: Tosca Fantasia
F.Poulenc : Sonata for clarinet and piano
M. Mangani: Sonata
Ch. Widor: Introduction et Rondo op. 72
F. Poulenc: Sonata
N. Gade: Fantasiestücke
M. Arnold: Sonatina
Concertos suggestions:
Clarinet Concerto No. 1 in F minor, Op. 73 (Weber, Carl Maria von)
Clarinet Concerto No. 2 in E-flat major, Op. 74 (Weber, Carl Maria von)
Clarinet Concerto in A major, K. 622 (Mozart, Wolfgang Amadeus)
Clarinet Concerto No. 2, Op. 5
(Crusell, Bernhard Hendrik)