package My::Module;

use Text::CSV;

sub new {
    my $class = shift;
    my $self = {
        _text_csv => Text::CSV->new( ... ),  # we store the object here
    };

    bless $self, $class;
}

sub some_method {
    my $self = shift;

    # we use it here
    my $result = $self->{_text_csv}->some_text_csv_action( @input );
}