Take one back, possibly, as may master for servant? (4,1,4)
I believe the answer is:
ring a bell
I believe this clue is a double definition.
'take one back possibly' is the first definition.
(to ring a bell is to jog a memory or take one back)
'as may master for servant?' is the second definition.
(a servant might be summoned by a bell)
(Other definitions for ring a bell that I've seen before include "Town crier may" , "What visitors do" , "as may 1A [SHEEPISH] part of 27 [WETHER-BY]" , "Contribute to ding-dong" , "Formally declare (appointment)" .)