Steps sailors may take with two instruments (8)
I believe the answer is:
hornpipe
'steps sailors may take' is the definition.
(dance associated with sailors)
'with two instruments' is the wordplay.
'two instruments' means two replacements for 'instrument'.
'with' says to put letters next to each other.
'instrument' becomes 'horn'.
'instrument' becomes 'pipe' (pipe is a kind of instrument).
'horn' next to 'pipe' is 'HORNPIPE'.
(Other definitions for hornpipe that I've seen before include "Lively solo dance associated with sailors" , "piece of music for an > old dance" , "Lively old sailors' dance" , "Lively jig" , "Obsolete instrument: naval dance" .)