Plan to adapt attic to store clubs (6)
I believe the answer is:
tactic
'plan' is the definition.
(I know that tactic is a type of plan of action)
'adapt attic to store clubs' is the wordplay.
'adapt' indicates anagramming the letters (I've seen 'adapting' mean this).
'to store' is an insertion indicator.
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'attic' anagrammed gives 'tatic'.
'tatic' going around 'c' is 'TACTIC'.
'to' acts as a link.
(Other definitions for tactic that I've seen before include "Manoeuvre designed to outwit enemy" , "Action aimed at a specific end" , "Manoeuvre, stratagem" , "A TT C-i-C (anag.)" , "Plan, manoeuvre" .)