Labourer at bar might grasp this for support (8)
I believe the answer is:
handrail
'grasp this for support' is the definition.
'handrail' can be an answer for 'for support' (I've seen this before). I am not sure about the rest of the definition.
'labourer at bar' is the wordplay.
'labourer' becomes 'hand' (hand is a kind of labourer).
'at' means one lot of letters go next to another.
'bar' becomes 'rail' (rail is a kind of bar).
'hand'+'rail'='HANDRAIL'
'might' acts as a link.
Can you help me to learn more?
(Other definitions for handrail that I've seen before include "Banister, say" , "Support beside stairs" , "something to hold on to" , "Hold on to it for support" , "Support for those climbing stairs" .)