This uses two techniques together: a hidden word (where the answer is concealed within other words) combined with a reversal (reading letters backwards). Look for an indicator that suggests hiding or containing, and another that suggests reversing or going back.
"Holds back" is doing double duty here - it indicates both that letters are hidden within the surrounding words AND that those hidden letters should be reversed. Look inside "Beryl never" for a sequence of letters, then read them backwards.
Answer: EVENLY | The letters Y-L-N-E-V-E are hidden in "berYL NEVEr" and "holds back" tells us to reverse them, giving us EVENLY (consistently).