Draw out small nail (4)
I believe the answer is:
spin
'draw out' is the definition.
(spinning is a kind of drawing out)
'small nail' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'nail' becomes 'pin' (I've seen this before).
's'+'pin'='SPIN'
(Other definitions for spin that I've seen before include "Mendacious PR; type of bowling" , "Swirling motion" , "Doctoring of news etc" , "Give biased view" , "Rotate quickly" .)