U+02A7 Latin Small Letter Tesh Digraph

The Wikipedia has the following information about this codepoint:

The voiceless palato-alveolar sibilant affricate or voiceless domed postalveolar sibilant affricate is a type of consonantal sound used in some spoken languages. The sound is transcribed in the International Phonetic Alphabet with ⟨t͡ʃ ⟩, ⟨t͜ʃ ⟩ ⟨tʃ ⟩ (formerly the ligature ⟨ʧ ⟩), or, in broad transcription, ⟨c⟩. This affricate has a dedicated symbol U+02A7 ʧ LATIN SMALL LETTER TESH DIGRAPH, which has been retired by the International Phonetic Association but is still used. The alternative commonly used in American tradition is ⟨č⟩. It is familiar to English speakers as the "ch" sound in "chip".

Historically, this sound often derives from a former voiceless velar stop /k/ (as in English church; also in Gulf Arabic, Slavic languages, Indo-Iranian languages and Romance languages), or a voiceless dental stop /t/ by way of palatalization, especially next to a front vowel (as in English nature; also in Amharic, Portuguese, some accents of Egyptian, etc.).