Possibly apt to be bent over the sink (3)
I believe the answer is:
tap
'be bent over the sink' is the definition.
I can't tell whether this defines the answer.
'possibly apt' is the wordplay.
'possibly' indicates anagramming the letters.
'apt' is an anagram of 'TAP'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for tap that I've seen before include "Gentle stroke" , "Draw upon Pat" , "Thread cutter; strike" , "Valve controlling flow - light knock" , "water supply" .)