regex - delimiter inside reqular expression Awk -

i have term aa-and-bb in 10th column of tab limited file, file.tsv.

i can aa-and-bb as

cat file.tsv | awk 'begin{fs="\t"};{print $10}' 

how further aa aa-and-bb?

you can use split().

split( $10, arr, "-" ); print arr[ 1 ];