Bearers every now and again lose their bearings (3)
I believe the answer is:
err
'lose their bearings' is the definition.
I can't tell whether this defines the answer.
'bearers every now and again' is the wordplay.
'every now and again' indicates alternate letters.
The alternate letters of 'bearers' are 'ERR'.
Can you help me to learn more?
(Other definitions for err that I've seen before include "Be incorrect" , "Go wrong" , "Transgress" , "Be mistaken" , "have an affair?" .)